1



                                 EXHIBIT 10.93




   2












                              SPECTRAN CORPORATION
                 SPECTRAN COMMUNICATION FIBER TECHNOLOGIES, INC.
                        SPECTRAN SPECIALTY OPTICS COMPANY
                         APPLIED PHOTONIC DEVICES, INC.

                                       TO

                         FLEET NATIONAL BANK, AS TRUSTEE


                              ---------------------

                                PLEDGE AGREEMENT

                              ---------------------






                          DATED AS OF DECEMBER 1, 1996
   3
                              PLEDGE AGREEMENT

         THIS PLEDGE AGREEMENT (as may be amended, restated or otherwise
modified from time to time, this "AGREEMENT"), dated as of December 1, 1996, by
and among each of SPECTRAN CORPORATION (together, with its successors and
assigns, the "PLEDGOR"), a Delaware corporation, SPECTRAN COMMUNICATION FIBER
TECHNOLOGIES, INC., a Delaware corporation, SPECTRAN SPECIALTY OPTICS COMPANY, a
Delaware corporation, and APPLIED PHOTONIC DEVICES, INC., a Delaware corporation
(all of the foregoing (other than the Pledgor), together with their respective
successors and assigns, referred to herein, collectively, as the "CURRENT
SUBSIDIARIES"), and FLEET NATIONAL BANK, a national banking association, as
security trustee under a certain Trust Indenture (as may be amended, restated or
otherwise modified from time to time, the "TRUST INDENTURE"), dated as of the
date hereof, among the Pledgor, the Subsidiaries, Fleet National Bank (in its
capacity as such security trustee, and together with any successor or
co-security trustee that becomes such in accordance with the provisions of the
Trust Indenture, the "TRUSTEE") and the other parties signatory thereto.

1.       PRELIMINARY STATEMENTS

         1.1 The Liens granted herein to the Trustee by the Pledgor are for the
ratable benefit of the Beneficiaries, as provided in the Trust Indenture.

         1.2 The Trustee is to act as trustee on behalf of the Beneficiaries in
accordance with the terms of the Trust Indenture and the other Security
Documents.

         1.3 All acts and proceedings required by law and by the certificate or
articles of incorporation and bylaws of each of the Pledgor and the Subsidiaries
necessary to constitute this Agreement a valid and binding agreement for the
uses and purposes set forth herein, in accordance with its terms, have been done
and taken, and the execution and delivery hereof has been in all respects duly
authorized.

2.       INTERPRETATION OF THIS AGREEMENT

         2.1      TERMS DEFINED.

         As used in this Agreement, the following terms have the respective
meanings set forth below or provided for in the section or other part of this
Agreement referred to immediately following such term (such definitions to be
equally applicable to both the singular and plural forms of the terms defined)
or, if not defined herein, then as defined in the Trust Indenture.

         AGREEMENT, THIS -- the introductory paragraph.

         BANK AGREEMENT -- has the meaning specified in the Trust Indenture.

         BANK LENDER -- has the meaning specified in the Trust Indenture.

         BENEFICIARY -- has the meaning specified in the Trust Indenture.

         BUSINESS DAY -- has the meaning specified in the Trust Indenture.


                                       1

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   4
                                             2. INTERPRETATION OF THIS AGREEMENT

 


         CLOSING DATE -- has the meaning specified in the Trust Indenture.

         CODE -- the Uniform Commercial Code as in effect from time to time in
any specified or applicable jurisdiction.

         COLLATERAL -- Section 3.1(b).

         CURRENT SUBSIDIARIES -- the introductory sentence hereto.

         DEFAULT -- an event or condition the occurrence of which would, with
the lapse of time or the giving of notice or both, become an Event of Default.

         EVENT OF DEFAULT -- has the meaning specified in the Trust Indenture.

         GOVERNMENTAL AUTHORITY -- means

                  (a)      the government of

                           (i) the United States of America or any state or
                  other political subdivision thereof, or

                           (ii) any jurisdiction in which the Company or any
                  Subsidiary conducts all or any part of its business, or which
                  asserts jurisdiction over any properties of the Company or any
                  Subsidiary, or

                  (b) any entity exercising executive, legislative, judicial,
         regulatory or administrative functions of, or pertaining to, any such
         government.

         LENDING DOCUMENTS -- has the meaning specified in the Trust Indenture.

         LIEN -- has the meaning specified in the Trust Indenture.

         MAJORITY BENEFICIARIES -- has the meaning specified in the Trust
Indenture.

         NOTE PURCHASE AGREEMENT -- has the meaning specified in the Trust
Indenture.

         PERSON -- means an individual, sole proprietorship, partnership,
corporation, trust, joint venture, unincorporated organization, limited
liability company or a government or agency or political subdivision thereof.

         PLEDGED STOCK -- means all the Pledgor's present and future right,
title, and interest in

         (i) the capital stock of the Subsidiaries owned as of the date hereof
by it, and

         (ii) all additional shares of capital stock of any Subsidiary from time
to time acquired by the Pledgor in any manner.

                                       2

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   5
                                             2. INTERPRETATION OF THIS AGREEMENT

 


         PLEDGED STOCK COLLATERAL -- Section 3.1(a).

         PLEDGOR -- the introductory paragraph.

         PROPERTY -- means any interest in any kind of property or asset,
whether real, personal or mixed, and whether tangible or intangible.

         SECURED OBLIGATIONS -- has the meaning specified in the Trust
Indenture.

         SECURITIES ACT -- means the Securities Act of 1933, as amended.

         SECURITY -- means "security" as defined in section 2(1) of the
Securities Act.

         SECURITY DOCUMENTS -- has the meaning specified in the Trust Indenture.

         SUBSIDIARY -- has the meaning specified in the Trust Indenture.

         TRUST INDENTURE -- the introductory paragraph.

         TRUSTEE -- the introductory paragraph.

         2.2      HEADINGS; INDEPENDENT CONSTRUCTION.

                  (a) SECTION HEADINGS ETC. The titles of the Sections of this
         Agreement appear as a matter of convenience only, do not constitute a
         part hereof and shall not affect the construction hereof. The words
         "herein," "hereof," "hereunder" and "hereto" refer to this Indenture as
         a whole and not to any particular Section or other subdivision.
         References to Sections are, unless otherwise specified, references to
         Sections of this Agreement. References to Annexes, Schedules, Exhibits
         and Attachments are, unless otherwise specified, references to Annexes,
         Schedules, Exhibits and Attachments attached to this Agreement.

                  (b) CONSTRUCTION. Each covenant contained herein shall be
         construed (absent an express contrary provision herein) as being
         independent of each other covenant contained herein, and compliance
         with any one covenant shall not (absent such an express contrary
         provision) be deemed to excuse compliance with one or more other
         covenants.

         2.3      SEPARATE AGREEMENTS.

         Notwithstanding that this Agreement is among each of the Pledgor, the
Subsidiaries and the Trustee, this Agreement shall be construed and interpreted
as a separate Agreement between the Pledgor and each Subsidiary, respectively,
and the Trustee, and any whole or partial invalidity of this Agreement in
respect of the Pledgor or any Subsidiary shall not have any effect on the
validity or enforceability of this Agreement as among the Pledgor or each
Subsidiary, respectively, as the case may be, and the Trustee.



                                       3


SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   6
                                                  3.  GRANT OF SECURITY INTEREST
 

         2.4      PARTIAL INVALIDITY.

         The unenforceability or invalidity of any provision or provisions of
this Agreement shall not render any other provision or provisions contained in
this Agreement unenforceable or invalid.

         2.5      GOVERNING LAW.

         THIS AGREEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY
THE INTERNAL LAWS OF THE COMMONWEALTH OF MASSACHUSETTS, EXCEPT TO THE EXTENT
THAT THE PERFECTION OF THE LIENS IN AND TO THE COLLATERAL ARE GOVERNED BY THE
LAWS OF ANY JURISDICTION OTHER THAN THE COMMONWEALTH OF MASSACHUSETTS.

3.       GRANT OF SECURITY INTEREST

         3.1      GRANT OF SECURITY INTEREST.

         As security for the payment by the Pledgor of the Secured Obligations
and the performance by the Pledgor of its other obligations and undertakings
under the Lending Documents to which it is a party and as security for the
performance of the obligations of the Pledgor hereunder, the Pledgor does hereby
grant, bargain, sell, release, convey, assign, transfer, mortgage, hypothecate,
pledge, confirm and grant a security interest to the Trustee, for the benefit of
the Beneficiaries in all of the Pledgor's right, title and interest in, to, and
under

                  (a) the Pledged Stock and all rights, options, warrants,
         stock, other Securities or other Property of any kind whatsoever which
         may hereafter be received, receivable or distributed in respect of, or
         exchanged for, all or any of such Pledged Stock and all certificates
         representing the foregoing (all of the foregoing being herein referred
         to, collectively, as the "PLEDGED STOCK COLLATERAL"), and

                  (b) all proceeds of the Pledged Stock Collateral and any
         replacements, additions, or substitutions thereof or thereto, all
         after-acquired Property in connection therewith, and all accounts and
         proceeds arising from the sale and disposition thereof, including,
         where applicable, insurance proceeds (the Pledged Stock Collateral and
         the proceeds and other Property described in this clause (b) are
         collectively referred to herein as the "COLLATERAL").

         3.2      PERFECTION OF SECURITY INTEREST IN COLLATERAL.

                  (a) DELIVERY OF PLEDGED STOCK. Contemporaneously with the
         execution of this Agreement, the Pledgor shall deliver, or cause to be
         delivered, to the Trustee:


                           (i) all certificates and other instruments evidencing
                  the shares of Pledged Stock owned as of the Closing Date by
                  the Pledgor and listed on Annex 1, accompanied by undated
                  stock powers and such other instruments and 



                                       4

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   7
                                                   3. GRANT OF SECURITY INTEREST


                  documents as the Trustee may reasonably request, duly endorsed
                  in blank by the registered owners of such certificates, with
                  signatures properly guaranteed;

                           (ii) any and all certificates or other instruments or
                  documents representing any of the Collateral; and

                           (iii) all other Property comprising part of the
                  Collateral with proper instruments of assignment, duly
                  executed, and such other instruments or documents as the
                  Trustee may reasonably request.

                  (b) DELIVERY OF OTHER COLLATERAL. If the Pledgor shall become
         entitled to receive or shall receive any shares of stock (including,
         without limitation, shares of Pledged Stock acquired after the Closing
         Date), options, warrants, rights or other similar Property (including,
         without limitation, any certificate representing a stock dividend, or
         any distribution in connection with any recapitalization,
         reclassification or increase or reduction of capital, or issued in
         connection with any reorganization of any Subsidiary or any other
         subsidiary of the Pledgor) in respect of the Pledged Stock Collateral
         (whether as an addition to, in substitution of, or in exchange for,
         such Pledged Stock Collateral or otherwise), the Pledgor agrees:

                           (i) to accept the same as the agent of the Trustee;

                           (ii) to hold the same in trust on behalf of and for
                  the benefit of the Trustee; and

                           (iii) to deliver the same to the Trustee on or before
                  the close of business on the second Business Day following the
                  receipt thereof by the Pledgor, in the exact form received,
                  with the endorsement in blank of the Pledgor when necessary
                  and with appropriate undated stock powers duly executed in
                  blank (with signatures properly guaranteed), to be held by the
                  Trustee subject to the terms of this Agreement, as additional
                  Collateral.

         3.3      FURTHER ASSURANCES.

         The Pledgor agrees that it will cooperate with the Trustee and the
Beneficiaries and will execute and deliver, or cause to be executed and
delivered, all such additional conveyances, stock powers, proxies, assignments,
financing statements and other recordings, instruments and documents as are
required to maintain the perfection of the security interests herein granted to
the Trustee for the benefit of the Beneficiaries and will take all such other
action, as the Trustee or the Majority Beneficiaries may reasonably request from
time to time in order to assure and confer unto the Trustee its rights and
remedies hereunder and to carry out the provisions and purposes hereof.

                                       5

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   8
                                                  3.  GRANT OF SECURITY INTEREST

 

         3.4      ACTION BY TRUSTEE AND BENEFICIARIES.

         The Trustee shall not be required to take any steps to perfect the
security interest in the Collateral or to realize upon the Collateral or
otherwise to enforce any of the rights hereunder. Without limiting the
generality of the foregoing, the Trustee shall not be under any obligation to
take any steps necessary to preserve rights in any of the Collateral against any
other parties but may do so upon the written instruction of the Majority
Beneficiaries, and all reasonable expenses incurred in connection therewith
shall be for the sole account of the Pledgor. The Beneficiaries shall not be
required to take any steps to perfect the security interest in the Collateral or
to realize upon the Collateral or otherwise to enforce any of the rights
hereunder. Without limiting the generality of the foregoing, the Beneficiaries
shall not be under any obligation to take any steps necessary to preserve rights
in any of the Collateral against any other parties.

         3.5      POWER OF ATTORNEY.

                  (a) TRANSFER OF COLLATERAL. The Pledgor hereby makes,
         constitutes and appoints the Trustee (or any duly authorized officer
         thereof), with full power of substitution, as its true and lawful agent
         and attorney-in-fact to arrange, at the request of the Trustee, for the
         transfer of any shares of the Collateral comprised of registered
         Securities on the books of the issuer thereof to the name of the
         Trustee or the Trustee's nominee at any time after the occurrence and
         during the continuance of an Event of Default.

                  (b) EXERCISE OF RIGHTS. The Pledgor hereby makes, constitutes,
         and appoints the Trustee (or any duly authorized officer thereof), with
         full power of substitution, its true and lawful agent and
         attorney-in-fact in order to effect any or all of the rights set forth
         in this Agreement; in addition thereto, the Pledgor hereby authorizes
         and empowers the Trustee (or any duly authorized officer thereof), as
         its lawful agent and attorney-in-fact as provided for in this Section
         3.5(b), to execute on behalf of the Pledgor, or in its own name,
         assignments, notices of assignments, financing statements, and other
         public records and notices in respect of the Collateral, and to do
         any and all things necessary or take any action in the name and on
         behalf of the Pledgor to carry out the intent of this Agreement,
         including, without limitation, to protect the interests in the
         Collateral granted to the Trustee.

                  (c) LIABILITY. The Pledgor agrees that neither the Trustee,
         Beneficiaries (or any of their respective officers, directors,
         employees, agents, investment advisors and affiliates) shall have any
         liability for any acts of commission or omission, or for any error of
         judgment or mistake of fact or law, with respect to the exercise of the
         powers of attorney granted under this Section 3.5, except that any
         Person exercising such powers of attorney may be liable for any such
         acts, errors, or mistakes resulting from its, his, or her own gross
         negligence or willful misconduct. The powers of attorney granted under
         this Section 3.5 are coupled with an interest and shall be irrevocable
         for so long as any of the Secured Obligations shall not have been
         fully and finally paid.

                                       6

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   9
                               4. COVENANTS AND WARRANTIES CONCERNING COLLATERAL

 

4.       COVENANTS AND WARRANTIES CONCERNING COLLATERAL

         4.1      COLLATERAL.

                  (a) SAFEKEEPING OF COLLATERAL. The Trustee shall not have any
         duty with respect to any Collateral other than the duty to use
         reasonable care in accordance with its customary practices in the
         safekeeping of any certificate or instrument evidencing such Collateral
         in its physical possession. Neither the Trustee nor any of the
         Beneficiaries shall be liable for any loss or damage to any of the
         Collateral arising from any act or default of any carrier, forwarding
         agency or other similar Person. Neither the Trustee nor any of the
         Beneficiaries shall be liable for any diminution in value of any of the
         Collateral.

                  (b) PAYMENTS AND DISTRIBUTIONS. If, while this Agreement is in
         effect, the Pledgor shall become entitled to receive or shall receive

                           (i) any payment or distribution upon the dissolution,
                  liquidation (in whole or in part), reorganization or
                  insolvency of any issuer of Collateral, or

                           (ii) any payment or distribution of capital on
                  account of any Collateral, the Pledgor agrees:

                           (A) to accept the same as the agent of the Trustee;

                           (B) to hold the same separate and apart from any of
                  its other funds or Property and in trust on behalf of and for
                  the benefit of the Trustee; and

                           (C) to deliver, or cause the delivery of, the same to
                  the Trustee, on or before the close of business on the second
                  Business Day following the receipt thereof by the Pledgor, in
                  the exact form received, with the endorsement of the Pledgor
                  when necessary, as additional Collateral.

                  (c) PAYMENTS AND DISTRIBUTIONS RETAINED BY PLEDGOR. Section
         4.1(b) notwithstanding, this Agreement shall not limit the Pledgor's
         right to receive, for so long as no Event of Default or Default shall
         have occurred and be continuing, ordinary cash dividends in respect of
         the Pledged Stock to the extent the same are permitted to be paid
         pursuant to each of the other Lending Documents. Upon the occurrence
         and during the continuance of any such Event of Default or Default, all
         the rights of the Pledgor described in the preceding sentence shall
         cease, and all such rights shall thereupon become vested in the
         Trustee, which shall have the sole and exclusive right and authority to
         retain and receive such dividends. If the Pledgor shall receive such
         cash dividends in contravention of this Section 4.1(c), the Pledgor
         shall promptly pay, or cause to be paid, all such cash dividends to the
         Trustee and, while the Pledgor is in possession of any such moneys
         received after an Event of Default, it shall hold the same separate and
         apart from any of its other funds or Property and in trust for the
         benefit of the Trustee. Any and all money and other Property paid over
         to or received by the Trustee pursuant to this

                                       7
SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   10
                               4. COVENANTS AND WARRANTIES CONCERNING COLLATERAL

 

         Section 4.1 shall be retained by the Trustee in an account to be
         established by the Trustee upon receipt of such money or other Property
         and shall be applied in accordance with the provisions of Section 5.5.

         4.2      VOTING RIGHTS CONCERNING PLEDGED STOCK COLLATERAL.

                  (a) PLEDGOR'S RIGHT TO VOTE. During the term of this
         Agreement, and so long as no Event of Default shall have occurred and
         be continuing, this Agreement shall not limit the Pledgor's right to
         vote the Pledged Stock and the other Collateral (to the extent such
         other Collateral has voting rights) on all corporate questions for all
         purposes. To that end, if the Trustee transfers, or causes the transfer
         of, such Pledged Stock or other Collateral into its name or the name of
         its nominee, the Trustee shall, upon the request of the Pledgor, unless
         an Event of Default shall have occurred and be continuing, execute and
         deliver or cause to be executed and delivered to the Pledgor proxies
         with respect to such Pledged Stock and other Collateral authorizing the
         Pledgor or its nominee to vote such Pledged Stock or such other
         Collateral.

                  (b) TRUSTEE'S RIGHT TO VOTE. Upon the occurrence and during
         the continuance of an Event of Default, all rights of the Pledgor to
         exercise the voting rights described in Section 4.2(a) shall cease, and
         the Trustee, upon written notice to the Pledgor (given in accordance
         with written instructions from the Majority Beneficiaries), shall be
         entitled to exercise all voting powers and corporate rights pertaining
         to the Pledged Stock and the other Collateral (including, without
         limitation, exchange, subscription and other rights, privileges and
         options with respect thereto), and the Trustee may, upon the occurrence
         and during the continuance of an Event of Default, upon written notice
         to the Pledgor (given in accordance with written instructions from the
         Majority Beneficiaries), declare all proxies theretofore executed by
         the Trustee to be terminated and to be null and void, and upon such
         notice, such proxies shall terminate and thereafter be null and void
         and of no effect whatsoever, and the Pledgor, forthwith upon the
         request of the Trustee (given in accordance with written instructions
         from the Majority Beneficiaries), shall cause the removal (if not
         already secured by the Trustee) of the officers and directors of each
         Subsidiary in order that the Trustee may elect the officers and
         directors of each Subsidiary that the Trustee would be entitled to
         elect pursuant to the voting rights under the Pledged Stock and other
         Collateral. The Pledgor shall execute and deliver to the Trustee all
         such documents and instruments (including, without limitation, proxies)
         as the Trustee shall request in order to effect the purposes of this
         Section 4.2(b).

         4.3      REPRESENTATIONS CONCERNING PLEDGED STOCK COLLATERAL.

         The Pledgor warrants and represents as follows:

                  (a)      OWNERSHIP OF COLLATERAL.

                           (i) Except for the security interests granted
                  hereunder, the Pledgor is the direct owner, beneficially and
                  of record, of the Pledged Stock and holds the

                                       8

SPECTRAN CORPORATION                                           PLEDGE AGREEMENT
   11
                               4. COVENANTS AND WARRANTIES CONCERNING COLLATERAL

 

                  Collateral free and clear of all Liens and security interests
                  of every kind and nature.

                           (ii) The Pledgor has the full right and legal
                  authority to pledge the Collateral in the manner hereby done
                  or contemplated.

                  (b) PRIORITY OF LIEN OF TRUSTEE. By virtue of the execution
         and delivery by the Pledgor of this Agreement, when the certificates
         representing the Pledged Stock owned by the Pledgor are delivered to
         the Trustee in accordance with this Agreement, the Trustee will obtain
         a valid and perfected first priority Lien upon and security interest in
         such Pledged Stock.

                  (c) VOTING RESTRICTIONS. There are no contractual restrictions
         upon the voting rights or upon the transfer of any of the shares of the
         Pledged Stock set forth on Annex 1.

                  (d) RIGHT TO VOTE. The Pledgor has the right to vote (to the
         extent such shares have voting rights), pledge, and grant a security
         interest in the Pledged Stock free of any encumbrances.

                  (e) GOVERNMENTAL AUTHORITIES. The Pledgor's execution and
         delivery of this Agreement, the pledging of the Collateral hereunder
         and the perfection of the security interest granted to the Trustee
         hereby does not require the consent, approval or authorization of, or
         filing, registration or qualification with, any Governmental Authority,
         including, without limitation, any securities exchange, other than the
         filing of appropriate Uniform Commercial Code financing statements (or
         other appropriate instruments evidencing security interests) in each of
         the jurisdictions listed on Annex 2.

                  (f) PLEDGED STOCK. The stock certificates set forth on Annex 1
         evidence all of the issued and outstanding shares of capital stock of
         the Subsidiaries.

                  (g) ENFORCEABILITY. This Agreement constitutes the legal,
         valid and binding obligation of the Pledgor, enforceable in accordance
         with its terms, except as such enforceability may be affected by
         applicable bankruptcy, reorganization, insolvency, moratorium and
         similar laws affecting creditors' rights generally and by general
         principles of equity, including judicial discretion in the enforcement
         thereof.

                  (h) NO CONFLICT. The execution, delivery and performance in
         accordance with its terms of this Agreement do not violate, conflict
         with, result in a breach of or constitute a default under

                  (i) any charter, bylaw, contract or other instrument of
                  agreement to which the Pledgor is a party or by which its
                  Property may be bound, or

                  (ii) to the Pledgor's knowledge, applicable law.

                                       9

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   12
                               4. COVENANTS AND WARRANTIES CONCERNING COLLATERAL

 

         4.4      SUBSEQUENT CHANGES AFFECTING THE COLLATERAL.

         The Pledgor represents and warrants that it has made its own
arrangements for keeping informed of changes or potential changes affecting the
Collateral (including, but not limited to, rights to convert, rights to
subscribe, payment of dividends, reorganization or other exchanges, tender
offers and voting rights), and the Pledgor agrees that neither the Trustee nor
any of the Beneficiaries shall have any responsibility or liability for
informing the Pledgor of any such changes or potential changes or for taking any
action or omitting to take any action with respect thereto.

         4.5      PLEDGED STOCK COVENANTS.

                  (a) STOCK ISSUANCE. The Pledgor shall not permit or suffer any
         Subsidiary or any other subsidiary of the Pledgor to, and no Subsidiary
         shall:

                           (i) issue any stock, any right to receive stock or
                  any similar right (including, without limitation, warrants,
                  options and other similar agreements) whether in addition to,
                  by stock dividend or other distribution upon, or in
                  substitution for, the Pledged Stock or otherwise, unless such
                  issuance is not prohibited by any of the Lending Documents and
                  such stock or other Securities are effectively pledged
                  hereunder in a manner satisfactory to the Trustee; or

                           (ii) sell, assign, transfer, exchange or otherwise
                  dispose of, or grant any option with respect to, the
                  Collateral.

                  (b) SUBSIDIARIES.  The Pledgor shall not:

                           (i) permit or suffer any Subsidiary or any other
                  subsidiary of the Pledgor to, and no Subsidiary shall,
                  dissolve or liquidate, retire any of its capital stock, reduce
                  its capital or merge or consolidate with any other entity,
                  except as otherwise expressly permitted by each of the Lending
                  Documents; or

                           (ii) vote any of the Pledged Stock in favor of any of
                  the foregoing.

                  (c) LIENS. The Pledgor will not cause or permit, or agree or
         consent to cause or permit in the future (upon the happening of a
         contingency or otherwise), any of the Collateral, whether now owned or
         hereafter acquired, to be subject to a Lien other than the security
         interest created by this Agreement.

         4.6      PROTECTION OF COLLATERAL; REIMBURSEMENT.

         All necessary expenses of protecting, storing, insuring, handling,
maintaining and shipping the Collateral, and all excise, property, sales and use
taxes imposed by any Governmental Authority on any of the Collateral or in
respect of the sale or other transfer thereof shall be borne and paid by the
Pledgor; and if the Pledgor shall fail to so pay any portion thereof when due,
the Trustee may at its option, but shall not be required to, pay the same and
charge the Pledgor

                                       10

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   13
                               4. COVENANTS AND WARRANTIES CONCERNING COLLATERAL


 

therefor, and the Pledgor agrees to promptly reimburse the Trustee therefor with
interest at the highest rate then payable on any of the Secured Obligations. The
Pledgor shall pay all sums so paid or incurred by the Trustee in respect of any
of the foregoing, any and all sums for which the Pledgor may become liable under
this Agreement or under any other Lending Document and all costs and
out-of-pocket expenses (including reasonable attorneys' fees, legal expenses and
court costs) that the Trustee may incur in evaluating, asserting, enforcing,
defending or protecting its security interest in or rights and interest in, the
Collateral, or any of its rights or remedies under this Agreement or under any
other Lending Document, and, until paid by the Pledgor with interest at the
highest rate then payable on any of the Secured Obligations, such sums shall be
considered as additional Secured Obligations owing by the Pledgor and, as such,
shall be secured by the Collateral and the proceeds from the sale thereof.

5.       DEFAULTS - REMEDIES

         5.1      DEFAULT REMEDIES.

                  (a) REMEDIES. If an Event of Default shall exist hereunder,
         the Trustee shall have, in addition to any other rights, all of the
         rights and remedies with respect to the Collateral of a secured party
         under the Code. In addition, to the extent permitted by applicable law,
         if an Event of Default shall exist hereunder, the Trustee, at the
         written instruction of the Majority Beneficiaries and on behalf of all
         Beneficiaries, shall sell or cause to be sold all or any part of the
         Collateral at public or private sale, in one (1) or more sales or lots,
         at such price as the Majority Beneficiaries may deem best, and for cash
         or on credit, or for future delivery, without assumption of any credit
         risk, and the purchaser of any or all of the Collateral so sold shall
         thereafter hold the Collateral so purchased absolutely, and free from
         any claim, encumbrance, or right of the Pledgor of any kind whatsoever.
         The Trustee will give the Pledgor reasonable notice of the time and
         place of any public sale thereof, or of the time after which any
         private sale or other intended disposition is to be made. Any sale of
         the Collateral conducted in conformity with reasonable commercial
         practices of banks, insurance companies, or other financial
         institutions disposing of Property similar to the Collateral shall be
         deemed to be commercially reasonable. Any requirements of reasonable
         notice shall be met if such notice is delivered to the Pledgor, as
         provided herein, at least ten (10) days before the time of the sale or
         disposition. Any other requirement of notice, demand, or advertisement
         for sale is, to the extent permitted by law, waived.

                  (b) SETOFF. If an Event of Default shall exist hereunder, any
         of the Beneficiaries may, without notice (with or without proceeding
         with or causing a sale or sales, or a foreclosure or foreclosures, of
         the Collateral or demanding performance by the Pledgor of the Secured
         Obligations owing to such Beneficiary), appropriate and apply to the
         payment of the Secured Obligations owed to it any and all Collateral in
         its possession and any and all balances, credits, deposit accounts,
         reserves, or other moneys due or owing to the Pledgor held by such
         Beneficiary hereunder or otherwise, subject, however, to the terms and
         provisions of the Trust Indenture.

                                       11

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   14
                                                          5. DEFAULTS - REMEDIES

 

                  (c) PRIVATE SALE. Anything herein to the contrary
         notwithstanding, and in view of the fact that federal and state
         Securities laws may impose certain restrictions on the method by which
         a sale of the Securities constituting all or part of the Collateral may
         be effected after and during the continuance of an Event of Default,
         the Pledgor agrees that, if an Event of Default shall exist hereunder,
         the Trustee may, from time to time, attempt to sell all or any part of
         such Securities by means of a private placement, restricting the
         bidders and prospective purchasers to those who will represent or agree
         as to their investment intent or method of resale or both in a manner
         reasonably required by the Trustee to assure compliance with applicable
         Securities laws. In so doing, the Trustee may solicit offers to buy
         such Securities or any part thereof, for cash, from a limited number of
         investors deemed by the Trustee, in its exclusive judgment or the
         exclusive judgment of the Majority Beneficiaries, to be responsible
         parties who might be interested in purchasing such Securities. If the
         Trustee solicits such offers from not fewer than three (3) such
         investors, then the acceptance by the Trustee of the highest offer
         obtained therefrom shall be deemed to be a commercially reasonable
         method of disposition of such Securities.

                  (d) REMEDIES ARE CUMULATIVE. All covenants, conditions,
         provisions, warranties, guaranties, indemnities, and other undertakings
         of the Pledgor contained in this Agreement and the other Lending
         Documents, or in any document referred to herein or therein, or
         contained in any agreement supplementary hereto or thereto, shall be
         deemed in addition to, and not in derogation or substitution of, any of
         the terms, covenants, conditions, or agreements of the Pledgor herein
         or therein contained; and the giving, taking, or enforcement of any
         other or additional security, collateral, or guaranty for the payment
         or performance of the Secured Obligations shall not operate to
         prejudice, waive, or affect the security of this Agreement, or any
         rights, powers, or remedies hereunder, nor shall the Beneficiaries or
         the Trustee be required to first look to, enforce, or exhaust, any such
         other or additional security, collateral or guaranties. No course of
         dealing on the part of any of the Beneficiaries or the Trustee, nor any
         delay or failure on the part of such Beneficiaries or the Trustee to
         exercise any right, shall impair such right or operate as a waiver of
         such right or otherwise prejudice the rights, powers, and remedies of
         such Beneficiaries or the Trustee. No waiver by the Beneficiaries or
         the Trustee of any Default or Event of Default, whether such waiver be
         full or partial, shall extend to or be taken to affect any subsequent
         Default or Event of Default, or to impair the rights resulting
         therefrom.

                  (e) EXPENSES. The Pledgor upon demand shall pay to the
         Beneficiaries and the Trustee all of their respective out-of-pocket
         expenses (including court costs and reasonable attorneys' fees and
         disbursements) of, or incident to, the enforcement of any of the
         provisions hereof and all other charges due against the Collateral,
         including, without limitation, taxes, assessments, and other amounts
         secured by security interests, Liens, or encumbrances upon the
         Collateral and any expenses, including transfer or other taxes, arising
         in connection with any sale, transfer, collection, or other disposition
         of the Collateral.

                                       12

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   15
                                                          5. DEFAULTS - REMEDIES

 

         5.2      EFFECT OF SALE, ETC.

                  (a) TITLE. Any sale or sales pursuant to the provisions of
         this Agreement, whether under any right or power granted hereby or
         pursuant to any legal proceedings, shall operate to divest the Pledgor
         of all right, title, interest, claim and demand whatsoever, either at
         law or in equity, of, in and to the Collateral, or any part thereof, so
         sold, and any Property so sold shall be free and clear of any and all
         rights of redemption by, through or under the Pledgor. At any such sale
         one or more Beneficiaries or the Trustee acting on behalf of such
         Beneficiaries may, to the extent permitted by applicable law, bid for
         and purchase the Property sold and may make payment therefor as set
         forth in Section 5.2(b), and any such Person so purchasing any such
         Property, upon compliance with the terms of sale, may hold, retain and
         dispose of such Property without further accountability to the Pledgor.

                  (b) APPLICATION OF PROCEEDS. The receipt by the Trustee, or by
         any Person authorized under any judicial proceedings to make any such
         sale, of the proceeds of any such sale shall be a sufficient discharge
         to any purchaser of the Collateral, or of any part thereof, sold as
         aforesaid; and no such purchaser shall be bound to see to the
         application of such proceeds, or be bound to inquire as to the
         authorization, necessity or propriety of any such sale. In the event
         that, at any such sale, any of the Beneficiaries is the successful
         purchaser, it shall be entitled, for the purpose of making settlement
         or payment, to use and apply such Collateral to its Secured Obligations
         by crediting thereon the amount apportionable and applicable thereto
         out of the net proceeds of such sale.

         5.3      RESTORATION OF RIGHTS AND REMEDIES.

         If the Trustee or any of the Beneficiaries (in accordance with the
Trust Indenture) shall have instituted any proceeding to enforce any right or
remedy hereunder, and such proceeding shall have been discontinued or abandoned
for any reason, or shall have been determined adversely to the Trustee or such
Beneficiary, then and in every such case, the Trustee and such Beneficiary
shall, subject to any determination in any such proceeding, be restored
severally and respectively to their former positions hereunder, and thereafter
all rights and remedies of the Trustee and such Beneficiary shall continue as
though no such proceeding had been instituted.

         5.4      CONSENT; MARSHALLING; SUBROGATION, ETC.

                  (a) CONSENT. The Pledgor hereby consents that from time to
         time, before or after the occurrence or existence of any Event of
         Default, with or without notice to or assent from the Pledgor, any
         Collateral at such time held by or available to the Trustee or any of
         the Beneficiaries or any other collateral at any time held by or
         available to any such Beneficiary or the Trustee for any obligation of
         any other Person secondarily or otherwise liable for any of the Secured
         Obligations, may be exchanged, surrendered, or released, and any of the
         obligations secured hereby or any of the obligations of such other
         Person may be changed, modified, altered, renewed, extended, continued,
         surrendered, compromised, waived, or released, in whole or in part, or
         any other indulgences may be granted to the Pledgor, all as such
         Beneficiary or the Trustee may

                                       13

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   16
                                                          5. DEFAULTS - REMEDIES

 

         see fit, and the Pledgor shall remain bound under this Agreement
         notwithstanding any such exchange, surrender, change, modification,
         alteration, renewal, extension, continuance, compromise, waiver, or
         release.

                  (b) MARSHALLING. The Pledgor hereby acknowledges that neither
         the Trustee nor any Beneficiary shall be under any obligation to
         marshal any assets in favor of the Pledgor or against or in payment of
         any or all of the Secured Obligations.

                  (c) SUBROGATION, ETC. The Pledgor hereby acknowledges that
         until all of the Secured Obligations shall have been indefeasibly paid
         in full and no Bank Lender is obligated to make a further advance under
         the Bank Agreement, the Pledgor shall have no right of subrogation,
         reimbursement, or indemnity whatsoever arising out of remedies
         exercised by the Trustee or any Beneficiary.

         5.5      APPLICATION OF PROCEEDS.

         The proceeds of any exercise of rights with respect to the Collateral,
or any part thereof, and the proceeds and the avails of any remedy under this
Agreement shall be paid to the Trustee and applied by the Trustee in accordance
with the provisions of the Trust Indenture. If there is a deficiency, the
Pledgor shall, subject always to the other provisions of this Agreement, remain
liable therefor and shall forthwith pay the amount of any such deficiency to the
Trustee.

         5.6      WAIVERS BY THE PLEDGOR.

                  (a) ACCEPTANCE. The Pledgor hereby waives notice of acceptance
         of this Agreement. The Pledgor further waives presentment and demand
         for payment of any of the Secured Obligations, protest and notice of
         dishonor or default with respect to any of the Secured Obligations, and
         all other notices to which the Pledgor might otherwise be entitled,
         except as otherwise expressly provided in this Agreement or any of the
         other Lending Documents to which it is party.

                  (b) WAIVER OF VALUATIONS, ETC. The Pledgor (to the extent that
         it may lawfully do so) covenants that it shall not at any time insist
         upon or plead, or in any manner claim or take the benefit or advantage
         of, any stay (except in connection with a pending appeal), valuation,
         appraisal, redemption or extension law now or at any time hereafter in
         force that, but for this waiver, might be applicable to any sale made
         under any judgment, order or decree based on this Agreement or any
         other Lending Document to which it is a party; and the Pledgor (to the
         extent that it may lawfully do so) hereby expressly waives and
         relinquishes all benefit and advantage of any and all such laws and
         hereby covenants that it will not hinder, delay or impede the execution
         of any power in this Agreement or in any other Lending Document granted
         and delegated to the Trustee, but that it will suffer and permit the
         execution of every such power as though no such law or laws had been
         made or enacted.

                                       14

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   17
                                                          5. DEFAULTS - REMEDIES

 

         5.7      REGISTRATION RIGHTS.

         In furtherance of the right of the Trustee to sell any or all of the
Collateral pursuant to Section 5.1, the Pledgor and each Subsidiary, as the case
may be, agrees that, following the occurrence of an Event of Default and upon
request of the Trustee and without expense to the Trustee, it will (and it will
cause the issuer of any of the Collateral to):

                  (a) use its best efforts to obtain all necessary governmental
         approvals for the sale by the Trustee of the Collateral or any part
         thereof;

                  (b) prepare, cause to be filed and use its best efforts to
         cause to become effective with respect to the Collateral, regardless of
         the number of shares or principal amount thereof, then held by the
         Trustee, one or more registration statements under the Securities Act,
         on Form S-1 (or such other form for which the respective issuer of the
         shares or other Securities constituting Collateral then qualifies and
         which is available for the sale of the Collateral in accordance with
         the method of disposition thereof) or one or more qualifications for
         exemption from registration under the Securities Act, or one or more
         similar documents pursuant to any statute then in effect corresponding
         to the Securities Act, relating to any public offering or sale by the
         Trustee of such Collateral;

                  (c) prepare, cause to be filed and use its best efforts to
         have such Collateral qualified or registered under the securities or
         "Blue Sky" laws of such other jurisdictions as the Trustee may request
         in connection with any such offering or sale;

                  (d) include in any such registration statement, qualification
         statement or similar document all appropriate information relating to
         the transaction or transactions in which the Trustee proposes to offer
         or sell such Collateral;

                  (e) cause to be filed such post-effective amendments and
         supplements to each such registration statement, qualification
         statement or similar document (including, without limitation, any
         prospectus or offering circular) as may be necessary to make any
         statement therein contained not untrue or misleading, and such filing,
         qualification or registration to be kept effective for such period as
         the Trustee may deem appropriate to facilitate the sale or other
         disposition of such Collateral;

                  (f) furnish the Trustee with such number of copies of each
         such registration statement, qualification statement or similar
         document, preliminary prospectus, prospectus, offering circular and any
         post-effective amendments or supplements thereto as the Trustee may
         request; and

                  (g) do such further acts and things as the Trustee may deem
         necessary or advisable to effectuate the offering and sale by the
         Trustee of such Collateral.

The Pledgor further agrees to indemnify and hold harmless the Trustee, each
Beneficiary and each underwriter (as defined in the Securities Act or any
statute then in effect corresponding to the Securities Act) acting in the
transaction, and each Person controlling (within the meaning of

                                       15

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   18
                                                          5. DEFAULTS - REMEDIES
 



the Securities Act or such corresponding statute) the Trustee, any Beneficiary
or any such underwriter, from and against any and all claims, actions, damages,
demands, judgments, losses, liabilities and expenses based upon or arising out
of any actual or alleged untrue statement of a material fact contained in any
such registration statement, qualification statement or similar document, or
part thereof, or any actual or alleged omission to state a material fact
required to be stated in any such registration statement, qualification
statement or similar document, or part thereof, or necessary to make the
statements contained therein not misleading.

         If the indemnification provided for in this Section 5.7 is unavailable
to or otherwise insufficient to hold harmless an indemnified party hereunder in
respect of any claims, actions, demands, judgments, losses, liabilities or
expenses referred to above, then the Pledgor shall, in lieu of indemnifying such
indemnified party, contribute to the amount paid or payable by such indemnified
party as a result of any claims, actions, demands, judgments, losses,
liabilities or expenses referred to above in such proportion as is appropriate
to reflect the relative fault of the Pledgor, the Trustee, each Beneficiary and
each underwriter in connection with the statements or omissions which resulted
in such indemnified party suffering any such claims, actions, demands,
judgments, losses, liabilities or expenses, as well as any other equitable
considerations. The relative fault of the Pledgor, the Trustee, each Beneficiary
and each underwriter shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission to state a material fact relates to information supplied by the
Pledgor, the Trustee, such Beneficiary or such underwriter and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission. The amount paid or payable by the Pledgor as
a result of any claims, actions, damages, demands, judgments, losses,
liabilities and expenses shall be deemed to include any legal or other fees or
expenses reasonably incurred by any indemnified party in connection with
investigating or defending any action or claim. The Pledgor and the Trustee
agree that it would not be just and equitable if contribution pursuant to this
paragraph were determined by any method of allocation that did not take account
of the equitable considerations referred to in this paragraph.

         The registration and other rights provided in this Section 5.7 may be
transferred to any purchaser of the Collateral, or any portion thereof, at any
sale described in Section 5.1. The Trustee may exercise its rights and powers
under this Section 5.1 prior to any sale pursuant to Section 5.1 or,
alternatively, the Trustee may assign such rights to the purchaser at any such
sale, who shall then have the registration rights and other rights specified
herein.

         The Pledgor and each Subsidiary further agrees that a breach of any of
the covenants contained in this Section 5.7 will cause irreparable injury to the
Beneficiaries, that the Beneficiaries have no adequate remedy at law in respect
of such breach and, as a consequence, agrees that each and every covenant
contained in this Section 5.7 shall be specifically enforceable against the
Pledgor and each Subsidiary, and the Pledgor and each Subsidiary hereby waives
and agrees not to assert any defenses against an election for specific
performance of such covenants except for a defense that no portion of the
Secured Obligations is then due and payable.

                                       16

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   19
6.       MISCELLANEOUS                                  6.       MISCELLANEOUS

         6.1      NOTICES.

         All communications under this Agreement shall be in writing and shall
be made to the Persons and addresses, and in the manner, provided in the Trust
Indenture.

         6.2      WAIVER AND AMENDMENT.

         No provision of this Agreement will be waived, amended, modified or
supplemented except by a written instrument executed by the Obligors and the
Trustee in accordance with the Trust Indenture.

         6.3      SURVIVAL.

         All warranties, representations, and covenants made by the Pledgor
herein or in any certificate or other document or instrument delivered by it or
on its behalf under this Agreement shall be considered to have been relied upon
by the Beneficiaries and shall survive the delivery to the Trustee of the
Collateral regardless of any investigation made by such Beneficiaries, from time
to time, of Secured Obligations or any other Person on their behalf. All
statements in any such certificate or other instrument shall constitute
warranties and representations by the Pledgor hereunder. This Agreement shall be
binding upon the Pledgor and its successors and assigns, and shall inure to the
benefit of and be enforceable by the Beneficiaries.

         6.4      SUCCESSORS AND ASSIGNS.

         Whenever any of the parties to this Agreement is referred to, such
reference shall be deemed to include the successors and assigns of such party,
and all the covenants, promises and agreements in this Agreement contained by or
on behalf of any of the Obligors, or by or on behalf of the Trustee, shall bind
and inure to the benefit of the respective successors and assigns of such
parties whether so expressed or not.

         6.5      ADDITIONAL PARTIES.

         Any Person which becomes the owner of capital stock Subsidiary after
the Closing Date and which is required, pursuant to the Trust Indenture or any
other Lending Document, to become a party to this Agreement shall execute and
deliver a duplicate original of this Agreement and, upon acceptance thereof by
the Trustee, such Person shall become a "Pledgor" under this Agreement for all
purposes and shall be deemed to have made the covenants and agreements of the
Pledgor set forth herein as of the date of the execution and delivery of such
acknowledgment and agreement (including, without limitation, the grant of the
security interest contained in Section 3) and shall comply with all other
obligations to be performed by a Pledgor.

                                       17

SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   20
                                                                6. MISCELLANEOUS

 

         6.6      SUBJECT TO TRUST INDENTURE.

         Any and all rights granted to the Trustee under this Agreement are to
be held and exercised by the Trustee as security trustee for the benefit of the
Beneficiaries pursuant to the provisions of the Trust Indenture. To the extent
set forth in the Lending Documents, each of the Beneficiaries shall be a
beneficiary of the terms of this Agreement. Any and all obligations under this
Agreement of the parties to this Agreement, and the rights and indemnities
granted to the Trustee under this Agreement, are created and granted subject to,
and in furtherance (and not in limitation) of, the terms of the Trust Indenture.
Nothing in this Agreement expressed or implied is intended or shall be construed
to give to any Person other than the Pledgor, the Beneficiaries and the Trustee
any legal or equitable right, remedy, or claim under or in respect of this
Agreement or any covenant, condition, or provision herein contained; and all
such covenants, conditions, and provisions are and shall be held to be for the
sole and exclusive benefit of the Pledgor, the Beneficiaries and the Trustee.

         6.7      TERM OF AGREEMENT.

         This Agreement shall be and remain in full force and effect until
terminated in accordance with the Trust Indenture; provided, that all
indemnities of the Pledgor contained in this Agreement shall survive, and remain
operative and in full force and effect regardless of, the termination of this
Agreement.

         6.8      ENTIRE AGREEMENT.

         This Agreement constitutes the final written expression of all of the
terms hereof and is a complete and exclusive statement of those terms.

         6.9      COUNTERPARTS.

         This Agreement may be executed and delivered in any number of
counterparts, each of such counterparts constituting an original but all
together one (1) and the same Agreement.

      [Remainder of page intentionally blank. Next page is signature page.]


                                       18
SPECTRAN CORPORATION                                            PLEDGE AGREEMENT
   21
         IN WITNESS WHEREOF, the parties have executed this Agreement of the
date first above mentioned.

                                       SPECTRAN CORPORATION



                                       By /s/ Bruce A. Cannon
                                         --------------------------------------
                                              Name: Bruce A. Cannon

                                              Title: Secretary

                                       SPECTRAN COMMUNICATION FIBER
                                       TECHNOLOGIES, INC.



                                       By /s/ Bruce A. Cannon
                                         --------------------------------------
                                              Name: Bruce A. Cannon

                                              Title: Secretary

                                       SPECTRAN SPECIALTY OPTICS
                                       COMPANY



                                       By /s/ Bruce A. Cannon
                                         --------------------------------------
                                              Name: Bruce A. Cannon

                                              Title: Secretary

                                       APPLIED PHOTONIC DEVICES, INC.



                                       By /s/ Bruce A. Cannon
                                         --------------------------------------
                                              Name: Bruce A. Cannon

                                              Title: Secretary

SPECTRAN CORPORATION                                           PLEDGE AGREEMENT
   22
                                       FLEET NATIONAL BANK, AS TRUSTEE



                                       By /s/ Michael T. Quaile
                                         --------------------------------------
                                              Name: Michael T. Quaile

                                              Title: Corporate Trust Officer

SPECTRAN CORPORATION                                          PLEDGE AGREEMENT
   23
                          Annex 1 to Pledge Agreement

                                                                         
                                  PLEDGED STOCK


SpecTran Specialty Optics Company Stock Certificate No. 1 for 10 shares of
common stock, par value $.01 per share, issued to SpecTran Corporation.*

SpecTran Communication Fiber Technologies, Inc. Stock Certificate No. 1 for 10
shares of common stock, par value $.01 per share, issued to SpecTran
Corporation.**

Applied Photonic Devices, Inc. Stock Certificate No. 1 for 10 shares of common
stock, par value $.01 per share, issued to SpecTran Corporation.




*        This stock certificate was issued under the name EBOC Acquisition Corp.
         The company changed its name to SpecTran Specialty Optics Company on
         February 7, 1994.

**       This stock certificate was issued under the name PTI Acquisition Corp.
         The company changed its name to SpecTran Fiber Communication
         Technologies, Inc. on October 8, 1995.
   24
                                                                         ANNEX 2

       LIST OF OFFICES IN WHICH FINANCING STATEMENTS OR OTHER APPROPRIATE
              INSTRUMENTS EVIDENCING SECURITY INTERESTS ARE FILED



DEBTOR NAME                        SECURED PARTY                                  FILING OFFICE
- -----------------------------------------------------------------------------------------------------------------------------
                                                                            
SPECTRAN CORPORATION               Fleet National Bank, as Trustee                Financing Statements:
                                                                                  ---------------------
                                                                                  Massachusetts Secretary of the Commonwealth
                                                                                  Worcester County, MA
                                                                                  Town of Sturbridge, MA
                                                                                  Connecticut Secretary of the State
                                                                                  Patent & Trademark:
                                                                                  -------------------
                                                                                  Commissioner of Patents & Trademarks
- -----------------------------------------------------------------------------------------------------------------------------
SPECTRAN COMMUNICATION FIBER       Fleet National Bank                            Financing Statements:
TECHNOLOGIES, INC.                                                                ---------------------
                                                                                  Massachusetts Secretary of the Commonwealth
                                                                                  Worcester County, MA
                                                                                  Town of Sturbridge, MA
                                                                                  Florida Secretary of State
                                                                                  Virginia Secretary of the Commonwealth
                                                                                  Mortgage:
                                                                                  ---------
                                                                                  Worcester County, Registry of Deeds
                                                                                  Patent & Trademark:
                                                                                  -------------------
                                                                                  Commissioner of Patents & Trademarks
- -----------------------------------------------------------------------------------------------------------------------------
SPECTRAN SPECIALTY OPTICS COMPANY  Fleet National Bank                            Financing Statements:
                                                                                  ---------------------
                                                                                  Connecticut Secretary of the State
                                                                                  Town Clerk, Avon, CT
                                                                                  Massachusetts Secretary of the Commonwealth
                                                                                  Town of Sturbridge, MA
                                                                                  Mortgage:
                                                                                  ---------
                                                                                  Town Clerk, Avon, CT
                                                                                  Patent & Trademark:
                                                                                  -------------------
                                                                                  Commissioner of Patents & Trademarks
- -----------------------------------------------------------------------------------------------------------------------------

SPECTRAN CORPORATION                                 Annex 2-1                                               PLEDGE AGREEMENT


   25

- ---------------------------------------------------------------------------------------------
                                                     
APPLIED PHOTONIC DEVICES, INC.   Fleet National Bank, as     Financing Statements:
                                 Trustee                     Connecticut Secretary of the 
                                                             State   
                                                             Town Clerk, Killingly, CT
                                                             Town Clerk, Brooklyn, CT
                                                             Massachusetts Secretary of the
                                                             Commonwealth
                                                             Town Clerk, Avon, CT
                                                             Patent & Trademark: 
                                                             Commissioner of Patents &
                                                             Trademarks          
- ---------------------------------------------------------------------------------------------







SPECTRAN CORPORATION             Annex 2-2                    PLEDGE AGREEMENT