SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K

[X]  Annual  Report  Pursuant  to Section 13 or 15(d) of the Securities Exchange
     Act of 1934

     For the fiscal year ended March 31, 2002.

[ ]  Transition  Report  Pursuant  to  Section  13  or  15(d)  of the Securities
     Exchange Act of 1934

     For the transition period from _________________ to _________________ .


                         COMMISSION FILE NUMBER 0-16106

                                APA OPTICS, INC.
             (Exact Name of Registrant as Specified in its Charter)


           MINNESOTA                                      41-1347235
  (State or other jurisdiction              (I.R.S. Employer Identification No.)
of incorporation or organization)


                               2950 N.E. 84TH LANE
                             BLAINE, MINNESOTA 55449
                                 (763) 784-4995
   (Address, including ZIP code and telephone number, including area code, of
                    registrant's principal executive office)

           Securities registered pursuant to Section 12(b) of the Act:

                                      NONE

           Securities registered pursuant to Section 12(g) of the Act:

                     COMMON STOCK, PAR VALUE $.01 PER SHARE

                                (TITLE OF CLASS)

                    SERIES B PREFERRED SHARE PURCHASE RIGHTS

                                (TITLE OF CLASS)

     Indicate  by  check  mark  whether the Registrant (1) has filed all reports
required  to  be  filed  by  Section  13 or 15(d) of the Exchange Act during the
preceding  12 months and (2) has been subject to the filing requirements for the
past  90  days. [X] YES  [ ]  NO

     Indicate  by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best  of  registrant's  knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form  10-K.

     The  aggregate  market  value of the voting stock held by non-affiliates of
the  registrant  as  of  May  24,  2002,  was  approximately  $22,904,368.

     The  number  of  shares  of common stock outstanding as of May 24, 2002 was
11,875,881.

                      DOCUMENTS INCORPORATED BY REFERENCE:

     Portions  of  our proxy statement for the annual shareholders meeting to be
held  in  August  2002  are  incorporated  by  reference  into  Part  III.



                                     PART I

ITEM 1.   BUSINESS.

GENERAL DEVELOPMENT OF THE BUSINESS.

     Since  the founding of APA Optics, Inc. in 1979, we have focused on leading
edge  research  in  gallium  nitride  (GaN),  sophisticated optoelectronics, and
optical  systems,  with  the  primary  goal  of developing advanced products for
subsequent  fabrication  and marketing. Based on this research we have developed
multiple  products  including  dense  wavelength  division  multiplexing  (DWDM)
optical  components,  a  range  of  GaN  based  devices,  and  precision optical
products.  We  believe  that  our  DWDM  and  GaN product areas have significant
potential  markets  and  we  have  developed  specific  expertise  and/or patent
positions  relevant  to  them.  As  a  long  time  designer  and manufacturer of
precision  optical  components, we also have substantial expertise in this area.

     In  addition  to  manufacturing  and  marketing  products,  we are actively
seeking  to  license  certain  portions  of  our intellectual property portfolio
related  to  GaN to other companies. While we have had discussions with multiple
companies,  we  have not entered into any license arrangements as of the date of
this  report. We consider the market for products using our GaN technology to be
just  now  emerging.  Such  products  may include GaN based transistors for cell
phone  base  stations.

     Our  DWDM  components  are  designed  to  enable  operators  of fiber optic
networks  to  cost  effectively increase the capacity of their networks. Several
factors,  including  deregulation  of  the telcom industry and readily available
capital,  fueled  strong  growth in the construction of these networks in recent
years,  which  has  resulted  in overcapacity. This overcapacity, coupled with a
recession and significantly tighter capital markets, has lead to a steep decline
in  capital  expenditures  for  fiber  optic  networks  and  network components,
including  DWDMs.

     In fiscal 2000, we eliminated our R&D contracts (historically a significant
source  of  revenue  for us) to concentrate on development and production of our
own  proprietary products. This shift has significantly reduced our revenues and
increased  our losses, which will continue until we realize significant revenues
from  these  products.


DESCRIPTION OF BUSINESS.

Products

We currently offer the products described below.

- -         Dense  Wavelength  Division  Multiplexing  (DWDM)  Components.  We
          -------------------------------------------------------------
     manufacture  and  market a family of DWDM components based on patented bulk
     diffraction  grating  technology.  These  components  enable  fiber  optic
     networks  to  transmit  data simultaneously on several wavelengths of light
     within  each  optical fiber of a cable as opposed to a single wavelength of
     light  in networks not employing DWDM technology. This multiplexing of data
     streams  using  different  wavelengths of light significantly increases the
     volume  of  data  transmission through an optical network without requiring
     the installation of additional fiber optic cable. Our DWDM components offer
     leading-edge  performance  for  key  parameters, such as insertion loss and
     crosstalk,  which  determine  the  integrity of the signals combined on the
     fiber.  These  advantages are magnified as more and more individual signals
     are multiplexed onto a single fiber, a current trend in the industry. These
     components  also operate without need for additional temperature control, a
     feature  that  supports  the  network  operator's  goal of minimizing power
     consumption.

          Our  design  allows  us  to  configure  DWDM  components  to work with
     singlemode  or  multimode  optical  fiber.  Singlemode  fiber  is typically
     associated  with  transmission  over long distances (required for long haul
     networks)  and  metro  area  rings,  while  multimode  fiber  is  typically
     associated  with  shorter networks found in campus and local area networks.
     Multimode demultiplexers are also an enabling component for multiwavelength
     fiber  free  communications  systems.


                                        2

          We  hold three patents in this field, the earliest of which was issued
     in  September  1995.  In addition, we have two pending patents and numerous
     international  filings  covering  key  markets  in  Europe  and  Asia.

- -         Precision  Optical Products. We manufacture and sell precision optical
          ---------------------------
     products  to third parties; however, we expect a significant portion of our
     capacity  in  this area to be directed at supplying components for our DWDM
     components  in  the  future.  Custom  optical  products  include:

     -    Optical  Lens  Systems. We design and build multi-element lens systems
          ----------------------
          and  components,  including mounting structures, for precision quality
          optical  needs  in  many  applications, including laser-based systems,
          imaging  systems, inspection systems, display systems, display optics,
          focusing  optics  for  ultraviolet fire alarms, alignment verification
          optics  for  dual  magnetic  recording  heads, and multi-magnification
          optics  systems  for  optical  comparators.

     -    Optical  Thin  Film Coatings. We custom design, develop, and fabricate
          ----------------------------
          optical  thin  film  coatings  for optical components of lasers, laser
          systems,  optical instruments, and optical devices. Our antireflective
          coatings  are  deposited  onto APA-fabricated lens components. We also
          use  our  thin  film coating facility to design, develop and fabricate
          coatings  for  lens  components  supplied  by  customers.

     -    Optical  Windows  and  Flats.  We manufacture standard, off-the-shelf,
          ----------------------------
          high  quality,  optical  windows  and  reference  flats.

- -         Ultraviolet (UV) Detectors.  We  currently manufacture and sell a wide
          ---------------------------
     range  of  UV  detectors.  The  UV  detectors  are  high  response compound
     semiconductor  devices  based on gallium nitride (GaN) and aluminum gallium
     nitride  (AlGaN).  They  are  compact  and  rugged  compared  to  competing
     technologies and have applications in spectrometry, UV curing processes, UV
     lamp  monitors,  solar radiation measurement, excimer-laser measurement and
     calibration,  biomedical  instrumentation,  and  flame  detection  and
     monitoring.  We  have  been  awarded  seven patents in the area of compound
     semiconductor  devices  and  have  one  pending

While  we  currently  manufacture  and  sell  a  wide  range  of UV detectors as
components,  our  focus  in this area is on value-added products based on our UV
detectors.  We  plan  to  actively  market  two  such  products  in Fiscal 2003:

- -         Sun(UV)Watch(R).  The  Sun(UV)Watch(R)  is  a  personal  ultraviolet
          ----------------
     radiation  (UV) monitor that also incorporates a time/day/date function. It
     detects  and  monitors  UV radiation that is potentially hazardous to human
     health,  telling  the  user  the safe exposure time according to government
     recommendations  and  sounding an alarm when that time has expired. Through
     fiscal  2002 we trial marketed our Sun(UV)Watch(R). Based on the results of
     this  trial  marketing  we made several improvements to the product and are
     preparing  for  a  full  rollout  in  fiscal  2003.  All  of our UV sensing
     value-added  products are built around our production UV detectors. We plan
     to  market  a  family  of  products designed to be worn on the wrist like a
     watch  or  clipped  on  a  personal item such as a backpack or golf bag. We
     believe  that  there are significant international markets for this type of
     product  in  addition  to  the  US  market. We expect to commit significant
     resources to the rollout of these products and, based on consumer response,
     may  commit  significant  resources  to expand our product offering in this
     area.

- -         TRUVMETER(TM) and Software. This product is targeted at industrial and
          --------------------------
     scientific users interested in measuring UV wavelengths with no sensitivity
     to  visible or infrared (IR) light. The product consists of a detector on a
     cable  that  is  connected  to  a  computer,  and  software that allows the
     computer  to  operate  like  a  meter  and data-logging instrument. Example
     target markets are manufacturers of UV lamps and users of UV-cured inks and
     paints.

Our  research  and  development  efforts  are  currently focused on the products
described  below.


                                        3

- -         Compound  Semiconductor  Electronic Devices: We have been a pioneer in
          -------------------------------------------
     the  research  of  transistors  based  on GaN/AlGaN heterojunctions and are
     maintaining  a  R&D  capability  in  this  technology  while  assessing
     commercialization opportunities. There are significant markets emerging for
     these  devices  with  the rapid growth of cellular phone use and associated
     infrastructure, and in other high power/frequency/temperature applications.
     Two  of our seven awarded patents in this technology are fundamental to the
     transistor  structure.  Significant  resources  would be required should we
     choose  to  develop  a  full  product  line  in  this  area.

- -         Components  and  Modules  for  Fiber  Optics Networks: To build on the
           ----------------------------------------------------
     strength  of  our  DWDM  components,  the  Company  is exploring the market
     potential  for  new  components  and  value-added  modules for fiber optics
     telecommunications  networks.  We  are also exploring other variants of the
     DWDM  line incorporating passive and active functions. Much of this work is
     based  on  a  technology  called  integrated  optics, which creates optical
     components  on  planer  waveguide  devices  with  integrated  circuit-like
     processes.  The  development  of  products  based  on  integrated  optics
     technology  will  require  the  commitment  of  significant  resources.

          Near  the  end  of  fiscal  2001,  we  formed  an alliance with Harris
     Corporation  to  jointly  develop  and market a product utilizing our DWDMs
     which enables 10 Gigabit Ethernet to be transported over existing multimode
     fiber  installations  in  short  haul  applications  (distances up to 1,000
     meters)  such  as  business and academic campuses. A lack of standards upon
     which  to  base  such  a  device  had postponed the further development and
     introduction  of  this product. Industry groups have recently made progress
     toward  establishment  of  applicable  standards. The current design of our
     product  would  not  support  these  standards.  We continue to monitor the
     commercial viability of this product for niche applications but do not have
     any  definitive  time  frame  for its introduction. The 10 Gigabit Ethernet
     product  is  based  on  our  current  DWDM technology and would not require
     significant  resources  for  further  development.

Marketing  and  Distribution

     We  market  our DWDM and UV detector products through a variety of channels
including  advertising  in  relevant  professional magazines, showcasing them in
trade  shows,  direct  mailing,  personal  visits,  and by use of manufacturer's
representatives  and  distributors  domestically  and  in  various  countries
(including  Japan,  Germany,  Italy  and France). We do not currently maintain a
large  internal  sales  force.  We  have  one  sales  person  dedicated  to  the
SunUVWatch(R)  and  we  also  maintain  product  information  on  our  website.

Sources  of  Raw  Materials

     Several purchased materials and components are used in the manufacturing of
our  products. Most of these are readily available from multiple suppliers. Some
critical  optical  components are purchased from a single or a limited number of
suppliers. We are working with other optical manufacturers to develop additional
sources  of  these  components  as well as pursuing internal development of this
capability  for some of these components.  The loss of access to some components
would  have  a  material  adverse effect on our ability to deliver products on a
timely  basis  and  on  our  financial  performance.

Patents  and  Intellectual  Property

     As of March 31, 2002, we had 12 patents issued in the United States and six
patents applied for inside and outside the United States. We believe our success
heavily  depends  upon  technology  we  develop  internally. The markets for our
products  are  characterized by rapid change and continual innovation that could
render  our  technology  and  patents obsolete before their statutory protection
expires.  Several  of  the  companies  we compete with have greater research and
development  resources  than  we  do and could develop technologies and products
that are similar or even superior to ours without infringing on our intellectual
property.


                                        4

Environmental  Compliance

     Because  we  handle a number of chemicals in our operations, we must comply
with  federal,  state  and local laws and regulations regarding the handling and
disposal  of  such  chemicals.  To date the cost of such compliance has not been
material.

Major  Customers

     In  prior  years,  we  provided  research  and  development  services under
contracts  with  various  governmental  agencies. Currently, we have no material
contracts  with  any  such  agencies.

     During  fiscal 2002, revenues from three customers represented 28%, 23% and
14%  of  our  total  revenues each. In fiscal 2001, we had three customers whose
sales represented 19%, 16%, and 15% of total revenues each. While significant as
a  percentage of revenues, the revenues in total dollars were not as significant
and  the  loss  of  any one of these customers would not have a material adverse
effect  on the Company.  Revenues from U.S. government agencies constituted more
than  ten  percent  of  our total operating revenues in fiscal year 2000. During
fiscal  year  2000,  35%  of our sales were to the U.S. Army and 3% of our sales
were  to  the  U.S.  Navy.

Backlog

     We  had  no  backlog  of orders at March 31, 2002 compared to approximately
$545,000  at  March  31,  2001  and  none  at  March  31,  2000.

     We  had  no  backlog of uncompleted research contracts at March 31, 2002 or
March 31, 2001, as compared to $28,400 at March 31, 2000. The elimination of the
backlog in uncompleted contracts is the direct result of our shift from contract
R&D  to  product  development  and  promotion.

Competition

     The  optoelectronics  and  compound semiconductor electronic device markets
are  evolving  rapidly  and,  therefore,  the  competitive  landscape  changes
continually. The opportunities presented by these markets have fostered a highly
competitive environment. Over time, this competition will likely result in price
reductions  and lower profit margins for the companies serving this market. Many
of  the  companies  engaged  in  these  businesses  are  well  financed and have
significantly greater research, development, production, and marketing resources
than  we  do.  Some  of  these  companies  have  long  operating  histories,
well-established  distribution  channels,  broad product offerings and extensive
customer  bases. Our ability to compete with these companies will depend largely
on the performance of our devices, our ability to innovate and develop solutions
for our customers, the extent and strength of our intellectual property, and our
ability  to  convince  customers  to  adopt our technology early in their design
cycle.

     Competitors  for  our  DWDM  products include Lightwave Microsystems, Inc.,
NetTest,  LightChip,  Inc., Wavesplitter Technologies, Inc., Alcaltel Optronics,
Corning  Incorporated  and  JDS  Uniphase  Corporation.  Competitors for our GaN
products  include  SVT  (GaN UV detectors), and various UV detector makers using
silicon  or other semiconductor materials that do not perform comparably to GaN,
but  are  lower-priced.  We are not aware of any companies currently marketing a
personal  UV  monitor  in  a  watch  configuration;  however,  we  are  aware of
intellectual  property  for  this general type of product. Newport, Melles Griot
and  Oriel offer scientific UV meters, some of which include GaN detectors as an
option.  A  number  of  firms  offer lower-performance, lower-cost UV meters for
industrial  applications.  Competitors  for  GaN/AlGaN  transistors,  which  are
currently  in  the  R&D  phase  at  APA  Optics,  include  Cree,  Inc., Nitronex
Corporation,  RFMD  Corporation,  and  some  Japanese  and  European  firms.

Research  and  Development

     During  the  fiscal  years  ended  March 31, 2002, 2001, and 2000, we spent
approximately  $1,114,100,  $1,176,000,  and $919,000, respectively, on research
and  development,  all  of which was related to the DWDM, compound semiconductor
electronic  devices,  UV  detector  and related products. In addition, in fiscal
years  2002  and  2001,  we  had  no  research activities sponsored by customers
compared  to $978,000 for fiscal year 2000. We operate in highly competitive and
rapidly  evolving  markets and plan to commit significant resources for research
and  development  for the foreseeable future. We will consider locating research
and  development  facilities  in  locations other than our current facilities in
Minnesota and South Dakota, including locations outside the United States, based
on  several factors, including accessibility to qualified personnel and facility
costs.


                                        5

Employees

     As  of  March  31, 2002, we had 51 full-time employees (including executive
officers). Our future performance is dependent on our ability to attract, train,
and retain highly qualified personnel. We have no employment agreements with our
employees.  The  loss  of  one or more key employees could negatively impact the
Company.

FACTORS  THAT  MAY  AFFECT  FUTURE  RESULTS

     Some  of  the statements contained in this report on Form 10-K that are not
purely  historical  are  "forward-looking  statements" within the meaning of the
Private  Securities Litigation Reform Act of 1995, Section 27A of the Securities
Act  of  1933 and Section 21E of the Securities Exchange Act of 1934, including,
without  limitations,  statements  regarding  the Company's expectations, hopes,
beliefs,  anticipations,  commitments,  intentions  and strategies regarding the
future.  Forward-looking  statements include, but are not limited to, statements
contained  in  "Item  1.  Business"  and  "Item  7.  Management's Discussion and
Analysis of Financial Condition and Results of Operations." Actual results could
differ  from  those projected in any forward-looking statements for the reasons,
among  others,  detailed  below. We believe that many of the risks detailed here
are  part  of doing business in the industry in which we compete and will likely
be  present  in  all  periods  reported.  The  fact  that  certain  risks  are
characteristic to the industry does not lessen the significance of the risk. The
forward-looking  statements  are  made  as  of the date of this Form 10-K and we
assume  no  obligation to update the forward-looking statements or to update the
reasons  why  actual  results  could  differ  from  those  projected  in  the
forward-looking  statements.

Unless  we  generate  significant  revenue  growth,  our increasing expenses and
negative  cash  flow  will  significantly  harm  our  financial  position.

     We have not been profitable since fiscal 1990. As of March 31, 2002, we had
an accumulated deficit of $18.2 million. We expect to incur operating losses for
the  foreseeable  future,  and  these losses may be substantial. Further, we may
continue to incur negative operating cash flow in the future. We have funded our
operations  primarily  through  the sale of equity securities and borrowings. We
have  significant  fixed expenses and we expect to continue to incur significant
and  increasing  manufacturing,  sales  and  marketing,  product development and
administrative  expenses.  As  a  result, we will need to generate significantly
higher  revenues  while  containing  costs  and  operating expenses if we are to
achieve  profitability.

Declining average selling prices for our DWDM products will require us to reduce
production  costs  to  effectively  compete  and  market  these  products.

     Since  the  time we first introduced our DWDM components to the marketplace
we  have  seen  the  average selling price of this type of component decline. We
expect  this  trend to continue. To achieve profitability in this environment we
must  continually  decrease  our  costs  of  production.  In order to reduce our
production  costs,  we  will  continue  to  pursue one or more of the following:

     -    Seek  lower cost suppliers of raw materials, components, or assemblies
          within  the  United  States,  or  internationally  including  Asia,
     -    Work  to  further  automate  our  assembly  process,  or
     -    Develop  value-added  components.
          We  will also seek to form strategic alliances with companies that can
          supply  these  services.

     Decreases  in  average  selling  prices  also require that we increase unit
sales  to  maintain  or  increase  our revenue. Our efforts to increase revenues
could  include:

     -    Expansion  of our product offerings, both through internally developed
          and  externally  sourced  products,  and


                                        6

     -    Expansion  of  our  international  marketing  efforts.

     There  can  be no guarantee that we will achieve these objectives or goals.
Our  inability  to  decrease  production  costs or increase our unit sales could
seriously  harm  our  business,  financial  condition and results of operations.

We  have  limited  experience  in  the development, manufacturing, marketing and
distribution  of  products  internationally.

     If  our efforts to reduce our costs to develop and manufacture our products
and/or  seek  more  international  customers  leads to the expansion of offshore
subcontracting  or the establishment of facilities outside of the United States,
we  will  be  subject  to  inherent  risks,  including,  without  limitation:

     -    Reduced  protection  of  intellectual  property  rights  in  foreign
          countries  in  which  we  may  choose  to  operate;
     -    Difficulties  in  attracting,  training and retaining qualified staff;
     -    Political  and  economic  instability,  terrorism  or  war;
     -    The  burden  of  complying  with  foreign laws and tax structures; and
     -    Risks  associated  with  fluctuations  in  the  value  of  currencies.

Demand for our products is subject to significant fluctuation. Market conditions
in the telecommunications market in particular may harm our financial condition.

     Demand  for  our products is dependent on several factors including capital
expenditures  in  the  communications  industry.  Capital  expenditures  can  be
cyclical  in  nature  and  there may be protracted periods of reduced demand for
component  parts. Similarly, periods of slow economic expansion or recession can
result  in  periods  of  reduced  demand  for our products. The current economic
slowdown has hit the telecommunications market particularly hard, resulting in a
significant reduction in capital expenditures for products such as our DWDMs. It
is  impossible  to  predict  how  long  the  slowdown will last. Such periods of
reduced demand harm our business, financial condition and results of operations.

We  must  increase  our manufacturing capacity or we will not be able to deliver
our  products  to  our  customers  in  a  timely  manner.

     Manufacturing  of  our products is a complex and precision process. We have
limited  experience  in  rapidly  increasing  our  manufacturing  capacity or in
manufacturing  products  at high volumes. We will be required to hire, train and
manage  additional  manufacturing personnel and improve our production processes
in  order  to  increase  our  production  capacity.  There  are  numerous  risks
associated  with  rapidly  increasing  capacity,  including:

     -    Difficulties  in  achieving  adequate  yields  from  new manufacturing
          lines,
     -    Difficulty  maintaining the precision manufacturing processes required
          by  our  products  while  increasing  capacity,
     -    The  inability  to timely procure and install the necessary equipment,
          and
     -    The  lack  of  availability  of  qualified  manufacturing  personnel.

     Our manufacturing expansion and related capital expenditures are being made
in  anticipation  of  a  level  of  customer orders that may not be realized. If
anticipated  levels  of customer orders are not received, we will not be able to
generate  positive  gross  margins  and  profitability.

Our dependence on outside manufacturers may result in product delivery delays.

     We purchase components that are incorporated into our products from outside
vendors.  If  these vendors fail to supply us with components on a timely basis,
we could experience significant delays in shipping our products. Any significant
interruption in the supply or support of any components could seriously harm our
sales  and  our  relationships  with  our  customers.

Our  products  may  have  defects  that  are not detected before delivery to our
customers.


                                        7

     Some  of  our  products  are  designed  to be deployed in large and complex
optical  networks  and  must  be compatible with other components of the system,
both  current  and future. In addition, our products may not operate as expected
over  long  periods of time. Our customers may discover errors or defects in our
products  only  after  they  have  been  fully deployed. If we are unable to fix
errors  or other problems, we could lose customers, lose revenues, suffer damage
to  our  brand  and reputation, and lose our ability to attract new customers or
achieve  market  acceptance.  Each of these factors would negatively impact cash
flow  and  would seriously harm our business, financial condition and results of
operations.

We must introduce new products and product enhancements to increase revenue.

     The  successful  operation  of  our  business  depends  on  our  ability to
anticipate  market  needs  and to develop and introduce new products and product
enhancements  that  respond  to  technological  changes  or  evolving  industry
standards  on  a  timely and cost-effective basis. Our products are complex, and
new  products  may  take  longer  and/or  cost  more  to develop than originally
anticipated.  These  products  may  contain  defects  or  have  unacceptable
manufacturing  yields when first introduced or as new versions are released. Our
products  could  quickly  become obsolete as new technologies are introduced. We
must  continue  to  develop  leading-edge  products  and  introduce  them to the
commercial  market  quickly  in  order  to be successful. Our failure to produce
technologically  competitive products in a cost-effective manner and on a timely
basis  will  seriously  harm  our  business,  financial condition and results of
operations.

Our  markets  are  characterized  by  rapid  technological  changes and evolving
standards.

     The  markets  we  serve  are  characterized  by rapid technological change,
frequent  new  product  introductions,  changes  in  customer  requirements  and
evolving  industry standards. In developing our products, we have made, and will
continue  to  make,  assumptions with respect to which standards will be adopted
within  our  industry.  If the standards that are actually adopted are different
from  those  that  we  have  chosen  to  support,  our  products may not achieve
significant  market  acceptance.

Our products may infringe on the intellectual property rights of others.

     Our  products  are  sophisticated  and  rely  on  complicated manufacturing
processes. We have received several patents on certain aspects of our design and
manufacturing  processes and we have applied for several more. Third parties may
still  assert  claims  that  our  products or processes unlawfully utilize their
intellectual  property.  Defense  against these claims, even if they lack merit,
may  be  time  consuming,  result  in expensive litigation and divert management
attention  from operational matters. If such a claim was successful, we could be
prevented from manufacturing or selling our current products, we could be forced
to  redesign  our  products,  or  we  could  be required to license the relevant
intellectual property at a significant cost. Any of these actions could harm our
business,  financial  condition  or  results  of  operations.

Acquisitions or investments could have an adverse affect on our business.

     As  part  of our strategy to expand our product offerings, develop internal
sources  of  components  and  materials,  and  acquire  new  technologies,  we
periodically  review  acquisition  and  investment prospects. There are inherent
risks  associated  with  making  acquisitions and investments, including but not
limited  to:

     -    Challenges  associated  with  integrating  the  operations, personnel,
          etc.,  of  an  acquired  company,
     -    Potentially  dilutive  issuances  of  equity  securities,
     -    Reduced  cash  balances  and/or increased debt and debt service costs,
     -    Large  one-time  write-offs  of  intangible  assets,
     -    Risks  associated  with  geographic or business markets different than
          those  we  are  familiar  with,  and
     -    Diversion  of  management  attention  from  current  responsibilities.

                      EXECUTIVE OFFICERS OF THE REGISTRANT

The  following  is  a  list of our executive officers, their ages, positions and
offices  as  of  March  31,  2002.


                                        8

     NAME                     AGE      POSITION

     Dr.  Anil K. Jain        56       Chief Executive Officer and President

     Kenneth A. Olsen         58       Vice President and Secretary

     Robert M. Ringstad       45       Chief Financial Officer

     DR. ANIL K. JAIN has been a Director, Chief Executive Officer and President
since  March  1979. He also served as Chief Financial Officer until August 2000.
From  1973  until October 15, 1983, when Dr. Jain commenced full time employment
with  the  Company,  he  was  employed  at  the  Systems  and Research Center at
Honeywell  Inc.  as  a  Senior  Research  Fellow,  coordinating  optics-related
development.

     KENNETH  A. OLSEN has been a Director since 1980, Secretary since 1983, and
Vice  President  since  1992.  Prior to joining the Company, he had been with 3M
Corp.,  St.  Paul,  Minnesota.

     ROBERT  M.  RINGSTAD  has  been  Chief  Financial Officer since joining the
Company  in  August 2000. Prior to joining the Company he was Vice President and
Controller  of  Echostar  Communications  Corporation,  Englewood, Colorado from
October  1999  to  January 2000. From October 1996 until March 1999 Mr. Ringstad
was  Chief  Financial  Officer  and  Chief Operating Officer for World Satellite
Network, Inc., Minneapolis, Minnesota. Prior to joining World Satellite Network,
Mr.  Ringstad  was  employed  with  Family  Partners,  Ltd.  of Minneapolis, MN.

ITEM  2.     PROPERTIES.

     We  have  corporate  offices,  manufacturing  facilities,  and laboratories
located  in an industrial building at 2950 N.E. 84th Lane, Blaine, Minnesota. We
currently  lease  23,500  square  feet of space under a sublease from Jain-Olsen
Properties,  a  partnership  consisting  of  Anil  K. Jain and Kenneth A. Olsen,
officers  and  directors  of  the  Company.  See  Note  J  of Notes to Financial
Statements  included  under  Item 8 of this Report. We own land directly west of
the  Blaine  facility  that  may  be  used  for  future  expansion.

     We  also  own  a  24,000 square foot production facility in Aberdeen, South
Dakota,  which is used for assembly of our DWDM components and UV detectors. The
land  upon  which  this  facility  is  located  was  granted  to us as part of a
financing  package  from  the City of Aberdeen. See Note D of Notes to Financial
Statements  included  under  Item  8  in  this  Report  for  further information
regarding  the  financing  of  this  facility.

     We believe these two facilities will be adequate for our physical needs for
the  foreseeable  future.  However,  in  order  to  reduce  costs in the face of
continuing downward pressure on component prices, we are evaluating placement of
research  and  development  and/or manufacturing facilities in locations outside
the United States. These facilities could be (a) owned or leased and operated by
us  or  (b)  owned  and/or  operated by others for us on a contract basis. These
other  facilities  could  be  in addition to or replace our existing facilities.

ITEM  3.     LEGAL  PROCEEDINGS.

     We are not currently involved in any material legal proceedings.

ITEM  4.     SUBMISSION  OF  MATTERS  TO  A  VOTE  OF  SECURITY-HOLDERS.

     No  matter  was  submitted  to a vote of security holders during the fourth
quarter  of  the  fiscal  year  covered  by  this  Report.


                                        9

                                     PART II

ITEM  5.     MARKET  FOR  REGISTRANT'S  COMMON  EQUITY  AND  RELATED STOCKHOLDER
             MATTERS.

     Our  common  stock is traded on The Nasdaq National Market under the symbol
"APAT."  The  following table sets forth the quarterly high and low sales prices
for  our  common stock for each quarter of the past two fiscal years as reported
by  Nasdaq:

FISCAL 2002                                          HIGH    LOW
- -----------                                         ------  ------

  Quarter ended June 30, 2001. . . . . . . . . . .  $11.50  $ 7.00
  Quarter ended September 30, 2001 . . . . . . . .    9.00    1.90
  Quarter ended December 31, 2001. . . . . . . . .    3.44    2.00
  Quarter ended March 31, 2002 . . . . . . . . . .    4.83    2.40

FISCAL 2001                                          HIGH    LOW
- -----------                                         ------  ------
  Quarter ended June 30, 2000. . . . . . . . . . .  $36.00  $12.25
  Quarter ended September 30, 2000 . . . . . . . .   24.38    9.75
  Quarter ended December 31, 2000. . . . . . . . .   17.31    5.50
  Quarter ended March 31, 2001 . .  . . . . . . . .  11.81    6.06


     There  were  approximately  350 holders of record of our common stock as of
March  31,  2002.

     We  have  never paid cash dividends on our common stock. The loan agreement
relating  to  certain  bonds  issued  by  the  South Dakota Economic Development
Finance  Authority  restricts  our  ability  to  pay  dividends.

ITEM  6.     SELECTED  FINANCIAL  DATA.



                                      2002          2001          2000          1999         1998
                                  ------------  ------------  ------------  ------------  -----------
                                                                           
Statements of Operations Data:
  Revenues . . . . . . . . . . .  $   595,955   $   885,740   $   420,809   $   722,030   $2,190,637
  Net loss applicable to common
  shareholder. . . . . . . . . .   (4,738,199)   (3,261,446)   (3,796,296)   (2,513,798)    (967,767)
  Net loss per share, basic and
  diluted. . . . . . . . . . . .        (0.40)        (0.29)        (0.43)        (0.30)       (0.12)
  Weighted average number of
  shares, basic and diluted. . .   11,896,976    11,180,165     8,744,125     8,512,274    8,376,661

Balance Sheet Data:
  Total assets . . . . . . . . .  $36,396,410   $41,914,451   $ 9,610,391   $ 6,804,976   $9,629,912
  Long-term obligations,
  including current portion. . .    2,461,363     2,836,831     3,049,258     3,214,712    3,609,652
  Shareholders' equity . . . . .   33,504,917    38,280,299     6,306,049     3,389,295    5,859,863


     The  above  selected  financial data should be read in conjunction with the
financial  statements and related notes included under Item 8 of this Report and
"Management's  Discussion  and  Analysis  of  Financial Condition and Results of
Operations"  appearing  in  Item  7  of  this  Report.


ITEM 7.      MANAGEMENT'S  DISCUSSION  AND  ANALYSIS  OF FINANCIAL CONDITION AND
             RESULTS  OF  OPERATIONS.


                                       10

General

     We  are  engaged  in  designing,  manufacturing,  and  marketing of various
optoelectronic  products,  ultraviolet  (UV)  detectors and related products and
optical  components.  For  several  years, we also received significant revenues
from  research and development services projects sponsored by various government
agencies.  In fiscal 1998, we shifted our emphasis from research and development
to product development, with the intent to eventually manufacture and market our
own  proprietary  products.  Accordingly, revenues from research and development
contracts  decreased  significantly  in  fiscal 2000 and we received no revenues
from  this  source  in  fiscal  years  2001  and  2002.

     For  the  last  several  years  our goal has been to manufacture and market
products/components  based  on  our  technology developments. We have focused on
dense  wavelength  division  multiplexer  (DWDM)  components  for  fiber  optic
communications  and  gallium  nitride-based  ultraviolet  (UV)  detectors  (both
components  and  integrated  detector/electronic/display  packages)  because  we
believe  that  these  two  product  areas have significant potential markets and
because  we  have  expertise  and/or  patent  positions  related  to  them.

Results  of  Operations

     We  recognized  operating  revenues of $595,955, $885,740, and $420,809 for
the  fiscal  years  ended  March  31,  2002,  2001,  and 2000, respectively. The
decrease of $289,785 or 33% from fiscal 2001 to 2002 was primarily the result of
lower  sales  of  DWDM  components.  A  reduction  in  capital  spending  in the
telecommunications  industry  in  addition  to  the  United  States  recession
significantly  reduced demand for these components. In addition, in August 2001,
one  customer  cancelled  an  order in excess of $500,000 when we were unable to
deliver  the  product  according  to  their  requirements.  The $464,931 or 111%
increase  in  revenues  from  fiscal 2000 to 2001 was due primarily to increased
sales of DWDM components. We had no backlog of orders at the end of fiscal 2002.
Our  backlog of DWDM component orders was approximately $545,000 as of March 31,
2001. There were no contract fees in fiscal 2002 or 2001 compared to $160,108 in
fiscal  2000.

     As  discussed  in  the  General  Development of the Business above, capital
expenditures  in  the telcom industry are down significantly. Because of this we
expect  revenues  for  at  least the next few quarters to be consistent with the
fourth  quarter  of  fiscal  2002.

     Cost  of sales were $3,545,519, $2,663,192, and $1,415,229 for fiscal 2002,
2001  and  2000,  respectively.  The  increase of $882,327 or 33% in the cost of
sales  from fiscal 2001 to 2002 was largely the result of inventory obsolescence
costs,  increased depreciation related to capital equipment purchases, and costs
associated  with  implementing  a quality assurance program. The increase in the
cost  of  sales of $1,247,963 or 88% from fiscal 2000 to 2001 was related to the
increase  in sales utilizing additional materials and direct labor. Gross margin
for product sales was negative in all three fiscal years as a result of low unit
production  and  sales  levels  relative  to the capital equipment and personnel
committed  to production. We expect further reductions in product pricing and we
expect  to  continue  to  experience  negative  gross  margins  until there is a
significant  increase  in  sales and production levels. Cost of contract fees in
fiscal  2000  was  $978,222  and  was  eliminated  in fiscal 2002 and 2001 as no
contract  research  was  performed  in  those  years.

     Research  and development expenses were $1,114,051, $1,175,564 and $918,811
for  fiscal  years 2002, 2001 and 2000, respectively. The decrease of $61,513 or
5%  from  fiscal  2001  to  2002 reflected a shift in personnel to manufacturing
products  from  product  development.  This  is  in  contrast to the increase of
$256,753 or 28% from fiscal 2000 to 2001, reflecting our continued investment in
the  development  of our DWDM and GaN technologies. The extent of our efforts to
develop variants of the DWDM line incorporating passive and active functions and
to  develop  transistors  based  on  GaN/AlGaN  heterojunctions  could result in
increased  research  and  development  expenditures  in  the  future.

     Selling,  general  and  administrative expenses were $1,733,846, $1,866,766
and $862,170 for fiscal years 2002, 2001 and 2000, respectively. The decrease of
$132,920  or 7% from fiscal 2001 to 2002 reflects our efforts to reduce expenses
in  response  to  the  slow economy, including a reduction in staff in the third
quarter  of  fiscal 2002. The increase of $1,004,596 or 117% from fiscal 2000 to
2001, was the result of compensation costs related to newly-hired key management
personnel,  non-cash compensation related to non-qualified stock options granted
to  employees,  the  cost  of  adopting  a  shareholder  rights  plan,  and fees
associated  with  listing  our  common  stock on the Nasdaq National Market. Our
selling,  general  and administrative expenses could increase significantly with
the  planned  rollout of our SunUVWatch(R) and our TRUVMETER(TM) in fiscal 2003.


                                       11

     We  realized  $1,193,525,  $2,002,713  and  $100,989  in interest income in
fiscal  years  2002, 2001 and 2000 respectively. The decrease in interest income
of  $809,188  or  40%  from  fiscal  2001  to 2002 reflects the steep decline in
short-term interest rates over the fiscal year and declining cash investments as
we  consumed  a  total  of  $5.4  million  in  cash to fund operations, purchase
equipment  and  retire  debt. The increase in interest income of $1,901,724 from
fiscal  2000 to 2001 reflected increased average balances of cash and short-term
investments  during  the fiscal year. We expect interest income to decline again
in  fiscal  2003 as short-term interest rates will likely remain low and cash is
consumed  in  operations.

     Our  net losses applicable to common shareholders for fiscal 2002, 2001 and
2000  were  $  4,738,199,  $3,261,446  and  $3,796,296  respectively.

Liquidity  and  Capital  Resources

     As  of March 31, 2002, our principal source of liquidity was our cash, cash
equivalents  and  short-term  investments, which totaled $31,606,403 compared to
$36,984,492  at  March  31,  2001.

     We used $3,753,553 to fund operating activities during fiscal 2002 compared
to  $2,230,867 in fiscal 2001, and $3,497,892 in fiscal 2000. In all three years
the  largest  use  of  cash  in  operating activities was the funding of the net
losses.  The net loss applicable to common shareholder for fiscal 2002 increased
to  $4,738,199  from $3,261,446 in fiscal 2001. The primary factors contributing
to  the  increased loss were the decline in sales, the increase in the inventory
obsolescence reserve and the decline in interest income. The decrease in the net
loss  from fiscal 2000 to 2001 was primarily related to the increase in revenues
and  interest  income.

     Investing  activities  provided  $14,595,028  in  fiscal 2002. We generated
$15,759,000  from  the sale of short-term investments and invested $1,050,274 in
property  and  equipment  and  $113,698 in patents. The majority of the proceeds
from  sales  of  our  short-term  investments  are  classified  as cash and cash
equivalents  on  the  balance sheet as of March 31, 2002. We used $16,995,645 in
investing  activities  in  fiscal  2001,  $15,759,000  of  which was invested in
short-term investments. In fiscal 2000 we used $235,394 in investing activities.

     We  used  $460,564  in financing activities in fiscal 2002. Primary uses of
cash in financing activities included the repurchase of common stock for $92,638
and  the  scheduled  retirement of debt used $375,468. We did not repurchase any
shares  of  our  stock  during the fourth quarter of fiscal 2002. In fiscal 2001
financing activities provided net cash of $34,510,098. Sales of our common stock
provided  $39,557,304,  retirement  of  preferred  stock used $5,033,054 and the
scheduled  retirement  of  debt  and  additions  to  bond  reserve funds used an
additional  $299,532. Financing activities provided cash of $6,862,343 in fiscal
2000.  Sales  of  preferred  and common stock provided $6,600,125, the scheduled
retirement of debt used $133,350, and a reduction in bond reserve funds provided
$314,747  of  cash.

     We  constructed  our manufacturing facility in Aberdeen, South Dakota using
certain economic incentive programs offered by the State of South Dakota and the
City of Aberdeen. At March 31, 2002, the total principal outstanding under bonds
issued by the State of South Dakota was $1,630,000. Interest on the bonds ranges
from 5% to 6.75%, and the bonds are due in various installments between 2003 and
2016.  These  bonds require compliance with certain financial covenants. We were
out  of  compliance  with some of these covenants during part of fiscal 2001 and
all of fiscal 2002. We are not in default in repayment of the bonds. For further
information  regarding  these bonds, see Note D of Notes to Financial Statements
included  under  Item  8  of  this  Report.


                                       12

     Our  capital  requirements  are  dependent  upon  several factors including
market  acceptance  of  our  products,  the  timing  and  extent  of new product
introductions  and  delivery,  and  the  costs  of  marketing and supporting our
products  on  a  worldwide  basis.  See  "Item  1.  Business."

     Although  we  believe  that  our  current cash and cash equivalents will be
sufficient  to  fund  our operations for more than the next 12 months, we cannot
assure  you  that  we  will  not seek additional funds through public or private
equity  or  debt  financing or from other sources within this time frame or that
additional  funding,  if needed, will be available on terms acceptable to us, or
at  all.  We  may  also consider the acquisition of, or evaluate investments in,
products  and  businesses  complementary  to  our  business.  Any acquisition or
investment  may  require  additional  capital.

Application  of  Critical  Accounting  Policies

     We  have  reviewed our use of estimates in applying our accounting policies
and  determined that significant changes in our various estimates would not have
a  material  impact  on  the presentation of our financial condition, changes in
financial  condition  or  results of operations. Accordingly, we do not consider
any  of  our estimates to be "critical estimates" as defined in the rules of the
Securities  and Exchange Commission. See Note A of Notes to Financial Statements
under  Item  8  of  this  Report for descriptions of the use of estimates in our
accounting  policies.  Our  management  and  the audit committee of our board of
directors  have  discussed our use of estimates and have approved our disclosure
relating  to  it  in  this  report.

     In  April  2002,  SFAS  144,  "Accounting for the Impairment or Disposal of
Long-Lived  Assets"  became  effective  for  our company. SFAS 144 clarifies the
guidance  used  to measure impairment and clarifies the accounting for disposals
of  long-lived  assets.  We  are  reviewing  the effect of this Statement on our
financial  statements and do not believe our adoption of the Statement will have
a  significant  impact  on  our  financial  statements.

ITEM 7A.      QUANTITATIVE  AND  QUALITATIVE  DISCLOSURES  ABOUT  MARKET  RISK.

     Our exposure to market risk for changes in interest rates relates primarily
to  our  investment portfolio. We invest in short-term securities of high credit
issuers  with  maturities  ranging  from  overnight up to 24 months. The average
maturity of the portfolio does not exceed 12 months. The portfolio includes only
marketable  securities  with  active  secondary  or  resale  markets  to  ensure
liquidity. We have no investments denominated in foreign country currencies and,
therefore,  our  investments are not subject to foreign exchange risk. See "Cash
and  Equivalents"  and  "Short-term Investments" in Note A of Notes to Financial
Statements  included  under  Item  8  of  this  Report.


                                       13

ITEM  8.     FINANCIAL  STATEMENTS  AND  SUPPLEMENTARY  DATA.

     Quarterly Results of Operations. The following tables present our unaudited
quarterly  operating  results  for  the  eight  quarters  ended  March 31, 2002:



                                                    Quarter Ended
                               --------------------------------------------------------
                                June 30,    September 30,    December 31,    March 31,
                                  2000          2000             2000          2001
                               ----------  ---------------  --------------  -----------
                                                                
Statement of Operations Data

Net revenue . . . . . . . . .  $  51,517   $      123,462   $     280,945   $  429,816
Gross profit (loss) . . . . .   (354,555)        (486,258)       (456,119)    (480,520)
Net loss. . . . . . . . . . .   (909,675)        (596,999)       (636,837)    (809,880)
Net loss per share. . . . . .  $   (0.12)* $        (0.05)  $       (0.05)  $    (0.07)


                                                    Quarter Ended
                               ---------------------------------------------------------
                                June 30,    September 30,    December 31,    March 31,
                                  2001          2001             2001           2002
                               ----------  ---------------  --------------  ------------
                                                                
Statement of Operations Data

Net revenue . . . . . . . . .  $ 434,335   $       87,574   $      49,089   $    24,957
Gross profit (loss) . . . . .   (508,518)        (869,742)       (977,252)     (594,052)
Net loss. . . . . . . . . . .   (645,062)      (1,364,499)     (1,422,002)   (1,306,636)
Net loss per share. . . . . .  $   (0.05)  $        (0.11)  $       (0.12)  $     (0.11)
<FN>

*  Reflects  a  loss of $(0.02) per share related to the redemption of preferred
stock.



     See  Item 14(a)(1) for financial statements filed  with  this  Report.

ITEM  9.     CHANGES  IN  AND  DISAGREEMENTS  WITH ACCOUNTANTS ON ACCOUNTING AND
             FINANCIAL  DISCLOSURE.

     Information regarding changes in accountants is incorporated in this Report
by  reference  to  the Current Report on Form 8-K filed on March 11, 2002. There
are  no disagreements with our accountants on accounting or financial disclosure
matters.


                                    PART III

ITEM  10.     DIRECTORS  AND  EXECUTIVE  OFFICERS  OF  THE  REGISTRANT.

     Information  regarding  executive  officers  is  included in Part I of this
Report

     Information  regarding  directors and the information required by Items 11,
and  13,  below,  is  incorporated  in  this  Report  by  reference to the proxy
statement  for  our  annual  meeting  of shareholders (anticipated to be held in
August  2002).

ITEM  11.     EXECUTIVE  COMPENSATION.

     Information  required  by  Item  11,  is  incorporated  in  this  Report by
reference  to  the  proxy  statement  for  our  annual  meeting  of shareholders
(anticipated  to  be  held  in  August  2002).


                                       14

ITEM  12.     SECURITY  OWNERSHIP  OF  CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.



- ---------------------  ------------------------  ----------------------  -------------------------------
                                 (a)                      (b)                          (c)
- ---------------------  ------------------------  ----------------------  -------------------------------
Plan category          Number of securities to   Weighted-average        Number of securities remaining
                       be issued upon exercise   exercise price of       available for future issuance
                       of options, warrants or   outstanding options,    under equity compensation
                       rights                    warrants and rights     plans (excluding securities
                                                                         reflected in column (a))
- ---------------------  ------------------------  ----------------------  -------------------------------
                                                                
Equity compensation
plans approved by
security holders                     369,550(1)  $                 7.40                     1,104,713(1)
- ---------------------  ------------------------  ----------------------  -------------------------------
Equity compensation
plans not approved by
security holders                     286,322(2)  $                13.70                Not applicable(2)
- ---------------------  ------------------------  ----------------------  -------------------------------
Total                                655,872     $                10.15                     1,104,713
- ---------------------  ------------------------  ----------------------  -------------------------------
<FN>
     (1)  These  securities  consist  of  options granted or available for grant
          under  the  1997 Stock Compensation Plan and the Stock Option Plan for
          Nonemployee  Directors.

     (2)  These  securities  consist of warrants. These warrants were not issued
          pursuant  to  any  formal  plan  and  there is no authorized number of
          warrants  available  for  issuance.


ITEM  13.     CERTAIN  RELATIONSHIPS  AND  RELATED  TRANSACTIONS.

     Information  required  by  Item  13,  is  incorporated  in  this  Report by
reference  to  the  proxy  statement  for  our  annual  meeting  of shareholders
(anticipated  to  be  held  in  August 2002).


                                       15



ITEM 14.      EXHIBITS,  FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.

 (a)  (1)  The following financial statements are filed herewith under Item  8.
                                                                           
                                                                                    Page
          (i)  Report of Independent Auditors as and for the year ended March
               31, 2002 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    18

          (ii) Report of Independent Auditors as of March 31, 2001 and as and
               for the periods ended March 31, 2001 and 2000. . . . . . . . . . .    19

               Balance Sheets as of March 31, 2002 and 2001 . . . . . . . . . . . 20-21

         (iii) Statements of Operations for the years ended
               March  31,  2002,  2001  and  2000 . . . . . . . . . . . . . . . .    22

          (iv) Statement of Shareholders' Equity for the years ended March 31,
               2002, 2001 and 2000. . . . . . . . . . . . . . . . . . . . . . . .    23

          (v)  Statements of Cash Flows for the years ended March 31, 2002, 2001
               and  2000  . . . . . . . . . . . . . . . . . . . . . . . . . . . .    24

          (vi) Notes to the Financial Statements. . . . . . . . . . . . . . . . .    25


      (2)  Financial  Statement  Schedules:  None

  (b)  Reports  filed  on  Form  8-K:

     On  March  11,  2002  we  filed  a Current Report on Form 8-K reporting the
hiring  of  Grant  Thornton  LLP  to audit our financial statements for the year
ended  March  31,  2002,  replacing  Ernst  &  Young  LLP.

  (c)  Exhibits. See Exhibit Index on pages 37-38.


                                       16

                                   SIGNATURES

     Pursuant  to  the  requirements  of  Section  13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its  behalf  by  the  undersigned,  thereunto  duly  authorized.

                                            APA  Optics,  Inc.


Date:  June 14, 2002                        By  /s/  Anil  K.  Jain
                                                ----------------------------
                                                Anil  K.  Jain
                                                President

     Pursuant  to  the requirements of the Securities Exchange Act of 1934, this
report  has  been  signed  below  by  the  following  persons  on  behalf of the
Registrant  and  in  the  capacities  and  on  the  dates  indicated.



SIGNATURE                    TITLE                                    DATE
- ---------                    -----                                    ----
                                                                

/s/ Anil K. Jain             President, Chief Executive Officer, and  June 14, 2002
- ---------------------------  Director
Anil K. Jain


/s/ Kenneth A. Olsen         Secretary, Vice President, and Director  June 14, 2002
- ---------------------------
Kenneth A. Olsen


/s/ Robert M. Ringstad       Chief Financial Officer                  June 14, 2002
- ---------------------------
Robert M. Ringstad


/s/ Gregory Von Wald         Director                                 June 14, 2002
- ---------------------------
Gregory Von Wald


/s/ Ronald G. Roth           Director                                 June 14, 2002
- ---------------------------
Ronald G. Roth


/s/ Stephen A. Zuckerman MD  Director                                 June 14, 2002
- ---------------------------
Stephen Zuckerman



                                       17

               REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS
               --------------------------------------------------


Board  of  Directors  and  Shareholders
APA  Optics,  Inc.

          We have audited the accompanying balance sheet of APA Optics, Inc.
(the Company) as of March 31, 2002, and the related statement of operations,
shareholders' equity, and cash flows for the year then ended. These financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audit. The financial statements of the Company as of March 31, 2001 and for
the two years in the period ended March 31, 2001, were audited by other auditors
whose report dated May 11, 2001 expressed an unqualified opinion on those
statements.

          We conducted our audit in accordance with auditing standards generally
accepted in the United States of America. Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe our audit provides a reasonable
basis for our opinion.

          In our opinion, based on our audit, the financial statements referred
to above present fairly, in all material respects, the financial position of APA
Optics, Inc. as of March 31, 2002, and the results of its operations and its
cash flows for the year then ended, in conformity with accounting principles
generally accepted in the United States of America.



Minneapolis, Minnesota
May 7, 2002


                                       18

                         Report of Independent Auditors

The Board of Directors and Shareholders
APA  Optics,  Inc.

We  have  audited the accompanying balance sheet of APA Optics, Inc. as of March
31,  2001,  and  the related statements of operations, shareholders' equity, and
cash  flows  for each of the two years in the period ended March 31, 2001. These
financial  statements  are  the  responsibility of the Company's management. Our
responsibility  is  to express an opinion on these financial statements based on
our  audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States. Those standards require that we plan and perform the audit
to  obtain  reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting  the  amounts  and  disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant estimates
made  by  management,  as  well  as  evaluating  the overall financial statement
presentation.  We  believe  that  our  audits provide a reasonable basis for our
opinion.

In  our  opinion,  the financial statements referred to above present fairly, in
all  material  respects,  the financial position of APA Optics, Inc. as of March
31,  2001,  and the results of its operations and its cash flows for each of the
two  years  in  the  period  ended March 31, 2001, in conformity with accounting
principles  generally  accepted  in  the  United  States.

                                          /s/  Ernst & Young LLP

Minneapolis,  Minnesota
May  11,  2001


                                       19



                                      APA OPTICS, INC.

                                       BALANCE SHEETS

                                          MARCH 31,


ASSETS                                                                2002           2001
                                                                  -------------  -------------
                                                                           

CURRENT ASSETS
   Cash and cash equivalents                                      $ 31,606,403   $ 21,225,492
   Short-term investments                                                    -     15,759,000
   Accounts receivable                                                  20,613        370,859
   Inventories, net                                                     40,075        415,316
   Prepaid expenses                                                    103,588         30,064
   Bond reserve funds                                                   70,000         65,000
                                                                  -------------  -------------

         Total current assets                                       31,840,679     37,865,731


PROPERTY, PLANT AND EQUIPMENT, net                                   3,748,004      3,248,191

OTHER ASSETS
   Bond reserve funds                                                  349,129        351,630
   Bond placement costs, net of accumulated amortization
    of $252,000 and $204,000 at March 31, 2002 and 2001                 68,013        116,012
   Patents, net of accumulated amortization of $347,998
     nd $291,998 at March 31, 2002 and 2001                            169,890        112,192
   Other                                                               220,695        220,695
                                                                  -------------  -------------
                                                                       807,727        800,529
                                                                  -------------  -------------

                                                                  $ 36,396,410   $ 41,914,451
                                                                  =============  =============


The accompanying notes are an integral part of these financial statements.


                                       20



      LIABILITIES AND
        SHAREHOLDERS' EQUITY                                           2002           2001
                                                                  -------------  -------------
                                                                           
CURRENT LIABILITIES
   Current maturities of long-term debt                           $  1,996,345   $  2,337,221
   Accounts payable                                                    127,926        495,410
   Accrued expenses                                                    302,204        301,911
                                                                  -------------  -------------

         Total current liabilities                                   2,426,475      3,134,542

LONG-TERM DEBT                                                         465,018        499,610

COMMITMENTS AND CONTINGENCIES                                                -              -

SHAREHOLDERS' EQUITY
   Undesignated shares, 4,999,500 authorized shares;
      no shares issued and outstanding                                       -              -
   Preferred stock, $.01 par value; 500 authorized shares;
      no shares issued and outstanding                                       -              -
   Common stock, $.01 par value; 50,000,000
      authorized shares; 11,875,881 and 11,915,456 shares issued
      and outstanding at March 31, 2002 and 2001                       118,759        119,155
   Additional paid-in capital                                       51,578,185     51,614,972
   Accumulated deficit                                             (18,192,027)   (13,453,828)
                                                                  -------------  -------------
                                                                    33,504,917     38,280,299
                                                                  -------------  -------------

                                                                  $ 36,396,410   $ 41,914,451
                                                                  =============  =============


The accompanying notes are an integral part of these financial statements.


                                       21



                                             APA OPTICS, INC.

                                        STATEMENTS OF OPERATIONS

                                          YEARS ENDED MARCH 31,


                                                              2002          2001           2000
                                                          ------------  -------------  ------------
                                                                              
Revenues
  Net sales                                               $   595,955   $    885,740   $   260,701
  Contract fees                                                     -              -       160,108
                                                          ------------  -------------  ------------
                                                              595,955        885,740       420,809

Costs and expenses
  Cost of sales                                             3,545,519      2,663,192     1,415,229
  Cost of contract fees                                             -              -       978,222
  Research and development                                  1,114,051      1,175,564       918,811
  Selling, general and administrative                       1,733,846      1,866,766       862,170
                                                          ------------  -------------  ------------
                                                            6,393,416      5,705,522     4,174,432
                                                          ------------  -------------  ------------

    Loss from operations                                   (5,797,461)    (4,819,782)   (3,753,623)

Interest income                                             1,193,525      2,002,713       100,989
Interest expense                                             (132,263)      (135,323)     (142,662)
                                                          ------------  -------------  ------------
                                                            1,061,262      1,867,390       (41,673)
                                                          ------------  -------------  ------------

    Loss before income taxes                               (4,736,199)    (2,952,392)   (3,795,296)

Income taxes                                                    2,000          1,000         1,000
                                                          ------------  -------------  ------------

    Net loss                                               (4,738,199)    (2,953,392)   (3,796,296)

Preferred stock dividend                                            -        (33,054)            -
Excess of preferred stock redemption over carrying
  value                                                             -       (275,000)            -
                                                          ------------  -------------  ------------

    Net loss applicable to common shareholders
                                                          $(4,738,199)  $ (3,261,446)  $(3,796,296)
                                                          ============  =============  ============

Net loss per share
  Basic and diluted                                       $     (0.40)  $      (0.29)  $     (0.43)
                                                          ============  =============  ============

Weighted average shares outstanding
  Basic and diluted                                        11,896,976     11,180,615     8,744,125
                                                          ============  =============  ============


The accompanying notes are an integral part of these financial statements.


                                       22



                                                  APA OPTICS, INC.

                                           STATEMENTS OF SHAREHOLDERS' EQUITY

                                                YEARS ENDED MARCH 31,


                                    Preferred stock        Common stock       Additional                      Total
                                   -----------------  ----------------------    paid-in      Accumulated   shareholders'
                                   Shares    Amount     Shares      Amount      capital        deficit        equity
                                   -------  --------  -----------  ---------  ------------  -------------  ------------
                                                                                      
Balance at March 31, 1999               -   $     -    8,512,274   $ 85,123   $ 9,700,258   $ (6,396,086)  $ 3,389,295

  Issuance of common stock              -         -      465,000      4,650     1,870,475              -     1,875,125

  Warrants exercised                    -         -       20,718        207        80,614              -        80,821

  Issuance of preferred stock         500         5            -          -     4,724,995              -     4,725,000

  Warrants issued in lieu of debt
     service payments                   -         -            -          -        32,104              -        32,104

  Net loss                              -         -            -          -             -     (3,796,296)   (3,796,296)
                                   -------  --------  -----------  ---------  ------------  -------------  ------------

Balance at March 31, 2000             500         5    8,997,992     89,980    16,408,446    (10,192,382)    6,306,049

  Issuance of common stock              -         -    2,845,868     28,459    39,528,845              -    39,557,304

  Warrants exercised                    -         -       64,646        646       252,584              -       253,230

  Redemption of preferred stock      (500)       (5)           -          -    (4,724,995)      (308,054)   (5,033,054)

  Warrants issued in lieu of debt
     service payments                   -         -            -          -        51,172              -        51,172

  Options exercised                     -         -        6,950         70        32,080              -        32,150

  Options issued as compensation        -         -            -          -        66,840              -        66,840

  Net loss                              -         -            -          -             -     (2,953,392)   (2,953,392)
                                   -------  --------  -----------  ---------  ------------  -------------  ------------

Balance at March 31, 2001               -         -   11,915,456    119,155    51,614,972    (13,453,828)   38,280,299

  Options exercised                     -         -        5,125         51        25,245              -        25,296

  Common stock repurchased              -         -      (43,200)      (432)      (92,206)             -       (92,638)

  Options issued as compensation        -         -            -          -        45,414              -        45,414

  Other                                 -         -       (1,500)       (15)      (15,240)             -       (15,255)

  Net loss                              -         -            -          -             -     (4,738,199)   (4,738,199)
                                   -------  --------  -----------  ---------  ------------  -------------  ------------

Balance at March 31, 2002               -   $     -   11,875,881   $118,759   $51,578,185   $(18,192,027)  $33,504,917
                                   =======  ========  ===========  =========  ============  =============  ============


The accompanying notes are an integral part of these financial statements.


                                       23



                                          APA OPTICS, INC.

                                    STATEMENTS OF CASH FLOWS

                                      YEARS ENDED MARCH 31,


                                                          2002          2001           2000
                                                      ------------  -------------  ------------
                                                                          
Cash flows from operating activities:
  Net loss                                            $(4,738,199)  $ (2,953,392)  $(3,796,296)
  Adjustments to reconcile net loss to net cash used
    in operating activities:
      Depreciation and amortization                       654,460        424,022       424,085
      Deferred compensation expense                        45,414         66,840             -
      Changes in operating assets and liabilities:
      Accounts receivable                                 350,246       (161,522)     (124,246)
      Inventories                                         375,241       (138,791)      (54,658)
      Prepaid expenses and other assets                   (73,524)       (10,261)         (892)
      Accounts payable and accrued expenses              (367,191)       542,237        54,115
                                                      ------------  -------------  ------------
        Net cash used in operating activities          (3,753,553)    (2,230,867)   (3,497,892)

Cash flows from investing activities:
  Purchases of property and equipment                  (1,050,274)    (1,128,453)     (195,342)
  Purchases of short-term investments                           -    (15,759,000)            -
  Sale of short-term investments                       15,759,000              -             -
  Acquisition of patents                                 (113,698)      (108,192)      (40,052)
                                                      ------------  -------------  ------------
     Net cash provided by (used in) investing
        activities                                     14,595,028    (16,995,645)     (235,394)

Cash flows from financing activities:
  Proceeds from sales of preferred stock                        -              -     4,725,000
  Payments for redemption of preferred stock                    -     (5,033,054)            -
  Proceeds from sales of common stock                           -     39,557,304     1,875,125
  Repurchase of common stock                              (92,638)             -             -
  Proceeds from exercise of warrants and options           10,041        285,380        80,821
  Payment of long-term debt                              (375,468)      (161,255)     (133,350)
  Bond reserve funds                                       (2,499)      (138,277)      314,747
                                                      ------------  -------------  ------------
     Net cash provided by (used in)
        financing activities                             (460,564)    34,510,098     6,862,343
                                                      ------------  -------------  ------------

Increase in cash and cash equivalents                  10,380,911     15,283,586     3,129,057

Cash and cash equivalents at beginning of year         21,225,492      5,941,906     2,812,849
                                                      ------------  -------------  ------------

Cash and cash equivalents at end of year              $31,606,403   $ 21,225,492   $ 5,941,906
                                                      ============  =============  ============

Supplemental cash flow information:
  Cash paid during the year for:
   Interest                                           $   132,263   $    135,323   $   142,662
   Income taxes                                             2,000          1,000         1,000

Noncash financing transactions:
  Warrants issued in lieu of debt service payments              -         51,172        32,104
                                                      ============  =============  ============


The accompanying notes are an integral part of these financial statements.


                                       24

                                APA OPTICS, INC.

                          NOTES TO FINANCIAL STATEMENTS

                          MARCH 31, 2002, 2001 AND 2000


              NOTE A  -  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     Nature of Business
     ------------------

     APA  Optics,  Inc.  (the  Company) currently manufactures and markets dense
     wavelength  division  multiplexer (DWDM) optical components, offers a range
     of gallium nitride-based devices, and manufacturers custom optics products.

     Revenue Recognition
     -------------------

     Revenue is recognized when the product has been shipped and accepted by the
     customer and collection is probable.

     Cash and Cash Equivalents
     -------------------------

     The  Company  considers  all  highly  liquid  investments  with  original
     maturities  of  three  months  or  less to be cash equivalents. Investments
     classified  as  cash  equivalents  at  March  31,  2002 consist entirely of
     short-term  money  market  accounts.  Investments  classified  as  cash
     equivalents  at  March  31,  2001  consisted  primarily  of certificates of
     deposit.  Cash  equivalents  are  stated  at  cost, which approximates fair
     value.

     Short-Term Investments
     ----------------------

     Short-term  investments  at  March  31,  2001  consisted of certificates of
     deposit  and  were stated at cost plus accrued interest, which approximated
     market.  At  March  31,  2002,  the  Company had no short-term investments.

     Accounts Receivable
     -------------------

     The  Company  grants  credit to customers in the normal course of business,
     but  generally does not require collateral or any other security to support
     amounts  due.  Management performs on-going credit evaluation of customers.
     The  Company  maintains  allowances for potential credit losses when needed
     and, when realized, have been within management's expectations. As of March
     31,  2002  and 2001, accounts receivable includes $9,122 and $24,339 billed
     under  the  retainage  provision  of  government  contracts.


                                       25

         NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Continued

     Inventories
     -----------

     Inventories  are  stated at the lower of cost or market. Cost is determined
     using  the  first-in, first-out (FIFO) method for raw material, actual cost
     for direct labor, and average cost for factory overhead in work-in-process.

     Property, Plant and Equipment
     -----------------------------

     Property,  plant  and  equipment  are  stated  at  cost,  less  accumulated
     depreciation  and  amortization. Depreciation and amortization are provided
     on  the  straight-line  method over the following estimated useful lives of
     the  assets:

                                                      Years
                                                     -------

          Building                                     20
          Equipment                                  3 - 10
          Leasehold improvements                     7 - 10

     Bond Placement Costs
     --------------------

     Bond placement costs relate to the issuance of bonds and are amortized over
     the life of the related bonds, or five to eight years.

     Patents
     -------

     Costs of obtaining and successfully defending patents are capitalized and
     amortized over three to five years.

     Stock-Based Compensation
     ------------------------

     The  Company  utilizes  the  intrinsic  value  method  for  stock-based
     compensation. Under this method, compensation expense is recognized for the
     amount  by  which the market price of the common stock on the date of grant
     exceeds  the  exercise  price  of  an  option.  The  Company  recognized
     compensation  expense  of $45,414 and $66,840 for the years ended March 31,
     2002  and  2001.  There  was no compensation expense recognized in the year
     ended  March  31,  2000.


                                       26

        NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Continued

     Fair Value of Financial Instruments
     -----------------------------------

     Due  to  their  short-term  nature, the carrying value of current financial
     assets  and  liabilities  approximates their fair values. The fair value of
     long-term  obligations,  if  recalculated  based on current interest rates,
     would  not  significantly  differ  from  the  recorded  amounts.

     Net Loss Per Share
     ------------------

     Basic  net  loss per share is computed by dividing net loss by the weighted
     average  number of common shares outstanding. Diluted net loss per share is
     computed  by  dividing  net  loss  by the weighted average number of common
     shares  outstanding  and  common share equivalents related to stock options
     and  warrants,  when  dilutive.

     Common  stock  options and warrants to purchase 440,822, 283,175 and 72,500
     shares  of  common  stock with a weighted average exercise price of $13.02,
     $15.31  and $31.95 were out-standing during the years ended March 31, 2002,
     2001  and  2000,  but  were  excluded  because  they  were  antidilutive.

     Use of Estimates
     ----------------

     The  preparation  of  financial  statements  in  conformity with accounting
     principles  generally  accepted  in  the  United States of America requires
     management  to  make  estimates  and  assumptions that affect the reported
     amounts  of  assets  and  liabilities,  related  revenues  and expenses and
     disclosure  about  contingent  assets  and  liabilities at the date of the
     financial  statements.  Actual results may differ from those estimates used
     by  management.

     Newly Adopted Accounting Standards
     ----------------------------------

     In September 2001, the FASB issued SFAS 144, "Accounting for the Impairment
     or  Disposal of Long-Lived Assets." SFAS 144 clarifies the guidance used to
     measure impairment and clarifies the accounting for disposals of long-lived
     assets.  This Statement became effective for the Company in April 2002. The
     Company  is  currently  reviewing  the  effect  of  this  Statement  on its
     financial  statements  and  does  not  believe  the  Statement  will have a
     significant  impact  on  the  Company.


                                       27

         NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Continued

     Impairment of Long-Lived Assets
     -------------------------------

               The  Company  reviews  long-lived assets and certain identifiable
     intangibles  for  impairment  when-ever  events or changes in circumstances
     indicate  that  the  carrying  amount  of  an asset may not be recoverable.
     Recoverability of assets to be held and used is measured by a comparison of
     the  carrying  amount  of  an asset to future net cash flows expected to be
     generated  by  the asset. If such assets are considered to be impaired, the
     impairment  to  be  recognized  is  measured  by  the  amount  by which the
     carrying  account of the assets exceed the fair value of the assets. Assets
     to  be disposed of are reported at the lower of the carrying amount or fair
     value  less  costs  to  sell.

               Reclassifications
               -----------------

               Certain  2001  and 2000 amounts have been reclassified to conform
     with  the  presentation  in  the  2002  financial  statements.


NOTE  B  -  INVENTORIES

               Inventories  consist  of  the  following  at March  31:

                                          2002      2001
                                        --------  --------

     Raw materials                      $ 21,448  $405,238
     Work-in-process                      18,627    10,078
                                        --------  --------

                                          40,075  $415,316
                                        ========  ========


                                       28




NOTE  C - PROPERTY,  PLANT  AND  EQUIPMENT

     Property, plant and equipment consist of the following at March 31:



                                                        2002        2001
                                                     ----------  ----------
                                                           
     Land                                            $   60,000  $   60,000
     Buildings                                        1,679,424   1,679,424
     Manufacturing equipment                          4,690,130   4,400,101
     Tools                                              423,748     418,573
     Office equipment                                   477,694     324,036
     Leasehold improvements                             968,073     806,219
                                                     ----------  ----------
                                                      8,299,069   7,688,353
     Less accumulated depreciation and amortization   4,551,065   4,440,162
                                                     ----------  ----------

                                                     $3,748,004  $3,248,191
                                                     ==========  ==========


NOTE  D  -  LONG-TERM  DEBT

     The following is a summary of the outstanding debt at March 31 related to
the Aberdeen facility:



                                                                         2002        2001
                                                                     -----------  -----------
                                                                            
     South Dakota Governor's Office of Economic Development and the
       Aberdeen Development Corporation Bond, 5% to 6.75%,
       due in various installments through 2016                       $1,630,000   $1,695,000

     Low interest economic development loans, 0% to 3%, due in
       various installments through 2016                                 264,583      526,317

     Forgivable economic development loans, 3%, due in various
       installments through 2003                                         566,780      615,514
                                                                     -----------  -----------
                                                                       2,461,363    2,836,831
     Less current maturities                                           1,996,345    2,337,221
                                                                     -----------  -----------

                                                                     $   465,018  $   499,610
                                                                     ===========  ===========



                                       29


NOTE  D  -  LONG-TERM  DEBT  -  Continued

     The forgivable loans are contingent upon employment levels at the facility
     meeting preset criteria. As partial consideration for any loans forgiven,
     the Company will grant warrants to purchase common stock of the Company
     based on the number of job credits earned by the Company in the preceding
     12 months divided by the exercise price. The exercise price of the warrants
     was set at $4.00 for year one of the debt and the yearly grant exercise
     price increases one dollar each year until the debt matures in fiscal 2003.
     No loans were forgiven and no new warrants were issued in fiscal year 2002.
     As of March 31, 2002, 36,511 warrants have been issued for loans forgiven
     totaling $187,289.

     At March 31, 2002 and 2001, the Company had on deposit with trustees
     $419,129 and $416,630 in reserve funds for current bond maturities, of
     which $70,000 and $65,000 are held in escrow. These funds are included in
     bond reserve funds in the accompanying balance sheets. The loan agreement
     requires the Company to maintain compliance with certain covenants. The
     Company was out of compliance with certain of these covenants in fiscal
     2002. All debt, except for the long-term portion of the low interest loans
     and the forgivable loans, to which the covenant violation does not apply,
     has been classified as current because of the Company's violation of one of
     the debt covenants contained in the agreement.

     As part of the Company's plan to construct their production facility, the
     city of Aberdeen, South Dakota gave the Company land with an approximate
     fair market value of $250,000. The gift was contingent upon the Company
     staying in the new building through June 23, 2002.

     All of the above debt is secured by land, buildings, and certain equipment
     of the Company.

     Scheduled maturities of the Company's long-term debt are as follows:

           Years ending March 31,
                    2003                    $1,996,345
                    2004                       235,713
                    2005                        17,639
                    2006                        17,639
                    2007                        17,639
                 Thereafter                    176,388
                                            ----------

                                            $2,461,363
                                            ==========


                                       30


NOTE  E  -  EMPLOYEE  BENEFIT  PLAN

     The Company maintains a contributory 401(k) profit sharing benefit plan
     covering all employees. During fiscal year 2001, the Company started
     matching 50% of employee contributions up to 6% of a participant's
     compensation. The Company's contributions under this plan were $53,000 and
     $34,000 for the years ended March 31, 2002 and 2001.


NOTE  F  -  INCOME  TAXES

     As of March 31, 2002, the Company has net operating loss carryforwards for
     federal income tax purposes of approximately $12,762,000 which expire in
     fiscal years 2002 to 2021.

     Deferred income taxes reflect the net tax effects of temporary differences
     between the carrying amounts used for financial reporting purposes and the
     amounts used for income tax purposes. Significant components of the
     Company's deferred taxes at March 31 are as follows:

                                          2002               2001
                                    -----------------  -----------------

          Net operating losses      $      4,339,000   $      4,204,000
          Depreciation                        25,000              6,000
          Other                              157,000            132,000
                                    -----------------  -----------------

          Total deferred tax asset         4,521,000          4,342,000
          Less valuation allowance        (4,521,000)        (4,342,000)
                                    -----------------  -----------------

                                    $              -   $              -
                                    =================  =================

     Income tax expense consists entirely of state taxes in 2002, 2001 and 2000.


NOTE  G  -  SHAREHOLDERS'  EQUITY

     The Board of Directors may, by resolution, establish from the undesignated
     shares different classes or series of shares and may fix the relative
     rights and preferences of shares in any class or series.


                                       31

NOTE  G  -  SHAREHOLDERS'  EQUITY  -  Continued

     In fiscal year 2002, the Board of Directors authorized the repurchase of up
     to the greater of $2,000,000 or 500,000 shares of common stock. As of March
     31, 2002, a total of 43,200 shares for $92,638 at an average price of $2.14
     per share had been repurchased.

     In fiscal year 2001, the Company redeemed all 500 shares of its preferred
     stock in exchange for a $5,033,054 cash payment. Also, the Company sold
     2,845,868 shares of its common stock in a registered offering, resulting in
     net proceeds of $39,557,304. The proceeds were used to fund operations.

     In fiscal year 2000, the Company sold in a private placement 500 shares of
     its preferred stock, resulting in net proceeds of $4,725,000. The proceeds
     were used to fund operations. Also in September 1999, the Company sold
     465,000 shares of its common stock in a private placement, resulting in net
     proceeds of $1,875,125. These proceeds were used to fund operations.


NOTE  H  -  SHAREHOLDER  RIGHTS  PLAN

     Pursuant to the Shareholder Rights Plan adopted by the Company in 2001,
     each share of common stock has attached to it a right, and each share of
     common stock issued in the future will have a right attached until the
     rights expire or are redeemed. Upon the occurrence of certain change in
     control events, each right entitles the holder to purchase one
     one-hundredth of a share of Series B Junior Preferred Participating Share,
     at an exercise price of $80 per share, subject to adjustment. The rights
     expire on November 10, 2010 and may be redeemed by the Company at a price
     of $.001 per right prior to the time they become exercisable.


NOTE  I  -  STOCK  OPTIONS  AND  WARRANTS

     Stock Options
     -------------

     The Company has various incentive and non-qualified stock option plans
     which are used as an incentive for directors, officers, and other
     employees. Options are generally granted at fair market values determined
     on the date of grant and vesting normally occurs over a six-year period.
     The plans had 1,104,713 shares of common stock available for issue at March
     31, 2002.


                                       32


NOTE  I  -  STOCK  OPTIONS  AND  WARRANTS  -  Continued

     Option transactions under these plans during the three years ended March
     31, 2002 are summarized as follows:


                                                 Weighted
                                                 average
                                    Number       exercise
                                    of shares     price
                                    ----------  ---------

     Outstanding at March 31, 1999    262,500   $    4.18
       Granted                         65,000        5.84
       Canceled                       (35,000)       4.67
                                    ----------
     Outstanding at March 31, 2000    292,500        4.49
       Granted                        160,000       10.06
       Canceled                       (48,375)       4.12
       Exercised                       (6,950)       4.64
                                    ----------
     Outstanding at March 31, 2001    397,175        6.81
       Granted                         90,000       10.33
       Canceled                      (112,500)       7.79
       Exercised                       (5,125)       4.94
                                    ----------
     Outstanding at March 31, 2002    369,550        7.40
                                    ==========

     The number of shares exercisable at March 31, 2002, 2001 and 2000 was
     108,674, 191,898 and 106,563, respectively, at a weighted average exercise
     price of $4.68, $5.77 and $4.67 per share, respectively.

     The following table summarizes information concerning currently outstanding
     and exercisable stock options at March 31, 2002:



                     Options Outstanding                                 Options exercisable
- -----------------------------------------------------------         ------------------------------
                               Weighted average
Range of            Number        remaining      Weighted average     Number     Weighted average
exercise prices   outstanding  contractual life   exercise price    outstanding   exercise price
- ----------------  -----------  ----------------  -----------------  -----------  -----------------
                                                                  
3.77 - $5.53          194,550        2.87 years  $            4.30       87,049  $            4.19
5.73 -    7.22         50,000        3.40 years               6.50       20,000               6.14
8.50 -  12.54          85,000        4.57 years              10.86            -                  -
13.18 -  17.15         35,000        3.38 years              15.23        1,625              13.18
23.00                   5,000        4.01 years              23.00            -                  -
                  -----------                                       -----------

                      369,550        3.40 years  $            7.40      108,674               4.68
                  ===========                                       ===========



                                       33


NOTE  I  -  STOCK  OPTIONS  AND  WARRANTS - Continued

     The weighted average fair value of options granted in 2002, 2001 and 2000
     was $9.30, $11.30 and $5.30. The fair value of each option grant is
     estimated on the date of grant using the Black-Scholes option pricing model
     with the following weighted average assumptions used for grants in 2002,
     2001 and 2000; zero dividend yield, risk-free interest rate of 4.5%, 6.0%
     and 5.5%; volatility of 132%, 93% and 44%, and a weighted-average expected
     term of the options of five years. The Company's 2002, 2001 and 2000 pro
     forma net loss and net loss per share would have been $(5,011,715),
     $(3,601,298) and $(4,083,136) or $(0.42), $(0.32) and $(0.47) loss per
     share had the fair value method been used for valuing options granted
     during 2002, 2001 and 2000. These effects may not be representative of the
     future effects of applying the fair value method.

     Stock Warrants
     --------------

     The following is a table of the warrants to purchase shares of the
     Company's common stock:

                                  Warrants     Exercise price   Expiration
                                outstanding      per share         date
                                ------------  ----------------  -----------

     Balance at March 31, 1999      120,339   $   3.30 - $5.00  1999 - 2004
       Issued                       108,337       4.88 - 49.47  2001 - 2005
       Exercised                    (20,718)      3.30  - 4.00  1999 - 2003
       Expired                       (3,100)          3.30             1999
                                ------------
     Balance at March 31, 2000      204,858       3.75 - 49.47  2000 - 2005
       Issued                       177,985       7.00 - 17.84  2005 - 2006
       Exercised                    (64,646)      3.75  - 5.00  2000 - 2004
                                ------------
     Balance at March 31, 2001      318,197       4.00 - 17.84  2002 - 2006
       Expired                      (31,875)          4.00             2002
                                ------------
     Balance at March 31, 2002      286,322       4.79 - 17.84  2002 - 2006
                                ============

     All warrants are exercisable upon date of grant.

     In  fiscal  year 2000, warrants totaling 45,500 at a value of $217,945 were
     issued to individuals assisting with the Company's capital raising efforts.
     Additionally, warrants totaling 57,500 at a value of $2,106,025 were issued
     in  connection with the issuance of preferred stock as a cost of financing.
     Both  sets  of warrants were valued based upon the Company's stock price at
     the  time  of the transaction.  An additional 5,337 warrants were issued in
     fiscal  year  2000  related  to  the  forgiveness  of  debt  (see  note D).


                                       34



NOTE  I  -  STOCK  OPTIONS  AND  WARRANTS  -  Continued

     In fiscal year 2001, warrants totaling 84,084 at a value of $1,500,059 were
     issued in connection with the issuance of common stock as a cost of
     financing. These warrants were valued based upon the Company's stock price
     at the time of the transaction. An additional 7,310 warrants were issued in
     fiscal year 2001 related to the forgiveness of debt (see note D).

     Additionally, in fiscal year 2001, 57,500 warrants were repriced at $14.72
     per share. In connection with the repricing, these individuals were issued
     86,591 additional warrants also at $14.72. The price of the warrants was
     based upon the value of the Company's stock price on the day of the
     transaction.


NOTE  J  -  COMMITMENTS

               The Company leases office and manufacturing facilities from a
     partnership whose two partners are major shareholders and officers of the
     Company. The lease agreement, classified as an operating lease, expires
     November 30, 2004 and provides for periodic increase of the rental rate
     based on increases in the consumer price index. Future minimum lease
     obligations under the lease as of March 31, 2002 are as follows:

     Year ending March 31:

          2003                                  $107,000
          2004                                   107,000
          2005                                    72,000

     Rental expense, all of which was paid to the partnership, was $138,000,
     $135,000 and $121,000 for the years ended March 31, 2002, 2001 and 2000.

NOTE  K  -  CONCENTRATIONS

     Major Customers
     ---------------

     Three major customers accounted for 28%, 23% and 14% of the Company's sales
     for the year ended March 31, 2002. Three different customers accounted for
     19%, 16% and 15% of the Company's sales for the year ended March 31, 2001.
     One customer accounted for 35% of the Company's sales for the year ended
     March 31, 2000. These customers also accounted for approximately 52% and
     69% of the outstanding trade receivable balance at March 31, 2002 and 2001.


                                       35



NOTE  K  -  CONCENTRATIONS  -  Continued

     Suppliers
     ---------

     Although the Company buys specific components from a limited number of
     suppliers, management believes that other suppliers could provide a similar
     component on comparable terms. A change in suppliers, however, could cause
     a delay in manufacturing and a possible loss of sales, which would affect
     short-term operating results adversely. There were no suppliers that
     provided more than 10% of the Company's total purchases in the years ended
     March 31, 2002, 2001 or 2000.


                                       36



                                              EXHIBIT INDEX

================================================================================================================
                                                                               PAGE NUMBER OR INCORPORATED
    NUMBER                            DESCRIPTION                                    BY REFERENCE TO
- --------------  -------------------------------------------------------  ---------------------------------------
                                                                   
    3.1         Restated Articles of Incorporation, as amended to date   Exhibit 3.1 to Registrant's Report on
                                                                         Form 10-Q for the quarter ended
                                                                         September 30, 2000
    3.2         Bylaws, as amended and restated to date                  Exhibit 3.2 to Registrant's Report on
                                                                         Form 10-KSB for the fiscal year
                                                                         ended March 31, 1999
    4.1(a)      State of South Dakota Board of Economic                  Exhibit 4.1(a) to the Report on 10-
                Development $300,000 Promissory Note, REDI Loan:         QSB for the quarter ended June 30,
                95-13-A                                                  1996 (the "June 1996 10-QSB")
    4.1(b)      State of South Dakota Board of Economic                  Exhibit 4.1(b) to the June 1996 10-
                Development Security Agreement REDI Loan No: 95-         QSB
                13-A dated May 28, 1996
    4.2(a)      700,000 Loan Agreement dated June 24, 1996 by and        Exhibit 4.2(a) to the June 1996 10-
                between Aberdeen Development Corporation and             QSB
                APA Optics, Inc.
    4.2(b)      300,000 Loan Agreement dated June 24, 1996               Exhibit 4.2(b) to the June 1996 10-
                between Aberdeen Development Corporation and             QSB
                APA Optics, Inc.
    4.2(c)      250,000 Loan Agreement dated June 24, 1996 by and        Exhibit 4.2(c) to the June 1996 10-
                between Aberdeen Development Corporation and             QSB
                APA Optics, Inc.
    4.2(d)      300,000 Loan Agreement dated June 24, 1996 by and        Exhibit 4.2(d) to the June 1996 10-
                between Aberdeen Development Corporation and             QSB
                APA Optics, Inc.
    4.3(a)      Loan Agreement between South Dakota Economic             Exhibit 4.3(a) to the June 1996 10-
                Development Finance and APA Optics, Inc.                 QSB
    4.3(b)      Mortgage and Security Agreement - One Hundred            Exhibit 4.3(b) to the June 1996 10-
                Day Redemption from APA Optics, Inc. to South            QSB
                Dakota Economic Development Finance Authority
                dated as of June 24, 1996
    4.4(a)      Subscription and Investment Representation               Exhibit 4.4(a) to the June 1996 10-
                Agreement of NE Venture, Inc.                            QSB
    4.4(b)      Form of Common Stock Purchase Warrant for NE             Exhibit 4.4(b) to the June 1996 10-
                Venture, Inc.                                            QSB
    4.5(a)      Certificate of Designation for 2% Series A Convertible   Exhibit 4.5(a) filed as a part of
                Preferred Stock                                          Registration Statement on Form S-3
                                                                         (Commission File No. 333-33968)
    4.5(b)      Form of common stock warrant issued in connection        Exhibit 4.5(b) filed as a part of
                with 2% Series A Convertible Preferred Stock             Registration Statement on Form S-3
                                                                         (Commission File No. 333-33968)
    4.6         Common Stock Purchase Warrant issued to Ladenburg        Exhibit 4.6 to Registrant's Report on
                Thalmann & Co. Inc. to purchase 84,083 shares            Form 10-K for fiscal year ended
                                                                         March 31, 2000 ("2000 10-K")
    4.7         Share Rights Agreement dated October 23, 2000 by         Exhibit 1 to the Registration
                and between the Registrant and Wells Fargo Bank          Statement on Form 8-A filed
                Minnesota NA as Rights Agent                             November 8, 2000


                                       37

================================================================================================================
                                                                               PAGE NUMBER OR INCORPORATED
    NUMBER                            DESCRIPTION                                    BY REFERENCE TO
- --------------  -------------------------------------------------------  ---------------------------------------
    10.1(a)     Sublease Agreement between the Registrant and Jain-      Exhibit 10.1 to the Registration
                Olsen Properties and Sublease Agreement and Option       Statement on Form S-18 filed with the
                Agreement between the Registrant and Jain-Olsen          Chicago Regional Office of the
                Properties                                               Securities and Exchange Commission
                                                                         on June 26, 1986
    10.1(b)     Amendment and Extension of Sublease Agreement            Exhibit 10.1(b) to 2000 10-K
                dated August 31, 1999
   *10.2(a)     Stock Option Plan for Nonemployee Directors              Exhibit 10.3a to Registrant's Report
                                                                         on Form 10-KSB for the fiscal year
                                                                         ended March 31, 1994 (the "1994 10-
                                                                         KSB")
   *10.2(b)     Form of option agreement issued under the plan           Exhibit 10.3b to 1994 10-KSB
   *10.3        1997 Stock Compensation Plan                             Exhibit 10.3 to Registrant's Report on
                                                                         Form 10-KSB for the fiscal year
                                                                         ended March 31, 1997
   *10.4        Insurance agreement by and between the Registrant        Exhibit 10.5 to Registrant's Report on
                and Anil K. Jain                                         Form 10-K for the fiscal year ended
                                                                         March 31, 1990
   *10.5        Form of Agreement regarding Repurchase of Stock          Exhibit 10.1 to Registrant's Report on
                upon Change in Control Event with Anil K. Jain and       Form 10-QSB for the quarter ended
                Kenneth A. Olsen                                         September 30, 1997 ("September
                                                                         1997 10-QSB")
   *10.6        Form of Agreement regarding                              Exhibit 10.2 to the September 1997
                Employment/Compensation upon Change in Control           10-QSB
                with Messrs. Jain and Olsen
    10.7        Form of Agreement regarding Indemnification of           Exhibit 10.7 to Registrant's Report on
                Directors and Officers with Messrs. Jain, Olsen,         From 10-K for the fiscal year ended
                Ringstad, Roth, Von Wald and Zuckerman                   March 31, 2002.
    23.1        Consent of Grant Thornton LLP
    23.2        Consent of Ernst & Young LLP
<FN>

*    Indicates management contract or compensation plan or arrangements required
to be filed as an exhibit to this form.



                                       38