Exhibit 10

Confidential  treatment  has been  requested  with  respect to  portions of this
document. Such portions are indicated by "[*]".


                           MEMORANDUM OF UNDERSTANDING


     THIS MEMORANDUM OF UNDERSTANDING, dated March 31, 1998 (this "Memorandum"),
sets forth  certain  understandings  of Hakuto Co. Ltd., a Japanese  corporation
(together with its controlled subsidiaries,  "Hakuto") and Emcore Corporation, a
New Jersey corporation ("Emcore").

     WHEREAS,  Hakuto and  Emcore  have  entered  into  various  distributorship
agreements,  as listed on Exhibit A hereto,  with respect to the distribution of
products  of  Emcore  in Japan  and other  Asian  countries  (collectively,  the
"Distributorship Agreements"); and

     WHEREAS,  Hakuto and Emcore have  agreed to amend and restate the  existing
Distributorship  Agreements  to cover the  distribution  by Hakuto of the Emcore
products  listed on Exhibit B hereto  (collectively,  the "Products") in certain
defined  markets  (such  amended  and  restated  agreements,  collectively,  the
"Definitive Restated Agreements").

     NOW, THEREFORE, this Memorandum sets forth the understandings of Hakuto and
Emcore with respect thereto.

1. Products in Japan. Under the Definitive Restated Agreements:

     (a) Exclusive Distribution Rights. Hakuto would have exclusive distribution
rights for the Products in Japan.

     (b) Term.  Hakuto  would have such  exclusive  distribution  rights for the
Products in Japan for 10 years from the date of this Memorandum.

     (c) MODE Commissions.  The commissions that would be received by Hakuto for
sales of MODE  Items in Japan  would be a  minimum  of 12% of the  total  amount
invoiced to any customer. (As used herein, the term "MODE Items" has the meaning
given to such term in Exhibit B hereto.)

     (d) Pegasus and E2M Commissions.  The commissions that would be received by
Hakuto for sales of Pegasus and E2M Items in Japan will be determined.  (As used
herein,  the term  "Pegasus and E2M Items" has the meaning given to such term in
Exhibit B hereto.)

     (e) No Minimum  Purchase  Requirement.  There would be no minimum  purchase
requirement with respect to the Products in Japan.

2.  Products in  Territories  Other Than Japan.  Under the  Definitive  Restated
Agreements:

     (a) Non-Exclusive Distribution Rights; Right of First Refusal. Hakuto would
have  non-exclusive  distribution  rights for the  Products in the  territories,
other than Japan,  specified in the Distributorship  Agreements ( the "Non-Japan
Territories").  Hakuto  would  have a  right  of  first  refusal  for  exclusive
distribution rights for the Products in the Non-Japan Territories.

     (b) Term.  Hakuto would have the rights  described in Paragraph  2(a) above
for a period of 10 years from the date of this Memorandum.

     (c)  Commissions.  The  commissions  that would be receivable by Hakuto for
sales of the Products in the Non-Japan Territories will be determined.

     (d) No Minimum  Purchase  Requirement.  There would be no minimum  purchase
requirement with respect to the Products in the Non-Japan Territories.

3. License Royalties. Under the Definitive Restated Agreements,  Hakuto would be
entitled to 10% of license royalties for MODE Items which are designed in by any
parties  in  Japan or by any  customers  procured  by  Hakuto  in the  Non-Japan
Territories and later licensed to such party or customer.

4. Transfer of Production.  Under the  Definitive  Restated  Agreements,  Emcore
would pay to Hakuto a commission of 10% of the total invoice amount of all sales
of  Products  that  are  designed  in Japan  by any  party  or in the  Non-Japan
Territories  by customers  procured by Hakuto but  produced or further  designed
outside of Hakuto's Territory.

5. Review of Commissions.  Under the Definitive Restated Agreements,  Hakuto and
Emcore  would:  (1) review  commissions  and  licensing  royalties on the second
anniversary  of the  date of this  Memorandum  and on  every  other  anniversary
thereafter; and (2) alter such commissions and licensing royalties, if agreed to
by both Hakuto and Emcore.

6.   Extension   of   Distributorship   Agreements.   The  term  of  the   Japan
Distributorship  Agreement is extended for a period of 10 years from the date of
this Memorandum.

7. Payment Terms. Hakuto will pay, and Emcore will earn, [*] in fees as follows:
(1) [*] upon  execution  of this  Memorandum,  such  payment  being a  one-time,
non-refundable  payment  for the  distribution  rights to the  Products  and not
contingent  upon any future  performance  by Emcore or delivery of any  Products
under  this  Memorandum;  and (2) an  additional  [*] will be due in four  equal
installments, such installments equaling [*] for each $2,000,000 in sales orders
generated in Japan and in the Non-Japan territories.

8. Emcore Warranty. Under the Definitive Restated Agreements,  Emcore would make
standard  and  customary   representations   and  warranties  for  the  type  of
distributorship  arrangement  contemplated  hereby,  and the  Products  would be
covered by Emcore's standard warranty policy.

9. Hakuto's  Organization.  Upon the execution of this Memorandum,  Hakuto would
assign a full time sales manager and, 60 days  thereafter,  Hakuto would appoint
an additional  sales person to specialize in the  distribution  of the Products.
Within one year from the execution of this Memorandum, Hakuto would form a group
to specialize in the distribution of the Products.

10. Change of Ownership.  If a "change of control" (as such term will be defined
in the Definitive Restated Agreements) occurs with respect to Emcore or its MODE
or Pegasus  Divisions,  then Emcore  would have the  option:  (1) to refund on a
pre-determined  proportionate  basis (as  specified in the  Definitive  Restated
Agreements)  payments  made by Hakuto as  described  in Paragraph 7 above or (2)
transfer and delegate the Definitive Restated Agreements and all obligations and
liabilities of Emcore  thereunder to, and have such  obligations and liabilities
assumed  by,  the party who is taking  control  of Emcore or its MODE or Pegasus
Division.  For purposes of establishing such  proportionate  basis, the payments
would be allocated as follows:  50% to MODE Items,  25% to Pegasus Items and 25%
to E2M Items.

11. Definitive  Restated  Agreements.  Hakuto and Emcore will finalize and enter
into  the  Definitive  Restated  Agreements  by June  30,  1998 or  sooner.  The
Definitive Restated Agreements will be dated as of March 31, 1998.

12. Confidentiality. Except as legally required, neither Emcore nor Hakuto shall
make any public  announcement  relating to the transaction  contemplated by this
Memorandum  without  the prior  agreement  thereto by the  other.  To the extent
permitted,  Emcore  shall  cooperate  with  Hakuto  with  respect to any legally
required disclosure.

13. Exclusive  Dealing.  At least and until June 30, 1998, Emcore will not enter
into any agreement,  discussion, or negotiation with, or provide information to,
any other corporation, firm or other person, or solicit, encourage, entertain or
consider any inquiries or proposals,  with respect to distribution rights of the
Products in Japan or in the Non-Japan Territories.

14.  Waiver  of  Right  to  Jury  Trial.  Each of the  undersigned  irrevocably,
willingly  and  voluntarily  waives  any right of trial by jury in any  judicial
proceeding involving,  directly or indirectly, any matter in any way arising out
of, related to or connected with the proposed transactions  contemplated by this
Memorandum.

                  [Remainder of page left intentionally blank.]



THIS  MEMORANDUM  OF  UNDERSTANDING   sets  forth  the   understandings  of  the
undersigned with respect to the above mentioned Definitive Restated Agreements.


HAKUTO CO. LTD.                                EMCORE CORPORATION


By: /s/ Shigeo Takayama                        By: /s/ Thomas G. Werthan
Name: Mr. Shigeo Takayama                      Name: Thomas G. Werthan
Title:   President                             Title:  Vice President, Finance
                                                       and Administration



                                    Exhibit A

                       Current Distributorship Agreements

1.   Amended and Restated Distributorship  Agreement, dated January 20, 1998, by
     and between Emcore and Hakuto (the "Japan Distributorship Agreement").

2.   Agreement,  dated as of January 20,  1998,  by and  between  Emcore and S&T
     Enterprises Ltd., a corporation of Hong Kong.

3.   Agreement,  dated as of January 20,  1998,  by and  between  Emcore and S&T
     Enterprises (Singapore) Pte. Ltd., a corporation of Singapore.




                                    Exhibit B

                                 Emcore Products

1.   The term "MODE Items" shall refer to all Vertical  Cavity Surface  Emitting
     Lasers  and  all  other   Products  of  Emcore's   MODE  Division  and  all
     Improvements thereon.
 
2.   The term  "Pegasus  and E2M Items"  shall  refer to all MR Sensors  and all
     other Products of Emcore's  Pegasus  Division and all Epitaxial  Wafers and
     all other  Products of the Emcore  Electronic  Materials  Division  and all
     Improvements thereon.
 
3.   As used  above,  the term  "Improvements"  means  any and all  alterations,
     whether patentable or not, to the Products or of the method of manufacture,
     design, construction, installation, maintenance or sale of the Products.