Document:

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                                                                   EXHIBIT 10.38

                                PLEDGE AGREEMENT

          This Pledge Agreement is made effective December 3, 2003 between IPG
Photonics Corporation, a Delaware corporation ("Pledgee"), and Robert A. Blair,
an individual ("Pledgor").

                                    Recitals

          Pledgee made a loan to Pledgor in the amount of $190,000 in connection
with the exercise of stock options for Common Stock of Pledgee, which loan was
evidenced by a Non-Recourse Promissory Note from Pledgor in favor of Pledgee,
dated March 17, 2000 (the "2000 Note").

          Pledgor agreed to pledge shares of Common Stock of IPG Photonics
Corporation pursuant to the 2000 Note and Plegdor has agreed to provide 50,000
additional shares of such Common Stock as collateral to Pledgee in consideration
of the reissuance of the 2000 Note as reflected in the Non-Recourse Promissory
Note, in the aggregate principal amount of $220,884, dated the date hereof,
executed and delivered by Pledgor (the "Non-Recourse Note").

          NOW, THEREFORE, it is agreed as follows:

          A. Creation and Description of Pledge Interest. In consideration of
the amendment to the loan by Pledgee to Pledgor as reflected in the Non-Recourse
Note, Pledgor hereby pledges 240,000 shares of Common Stock of IPG Photonics
Corporation owned by Pledgor (the "Shares") all of such Shares (herein sometimes
referred to as the "Collateral") represented by certificates number 29 & 30
("Certificates Nos. 29 & 30"), duly endorsed in blank or with executed stock
powers, and herewith delivers said certificate to Pledgee, who shall hold said
Certificates Nos. 29 &30 subject to the terms and conditions of this Pledge
Agreement.

          The Collateral (together with an executed blank stock assignment for
use in transferring title to all or a portion of the Shares to Pledgee if, as
and when required pursuant to this Pledge Agreement) shall be held by the
Pledgee as security for the repayment of the Non-Recourse Note, and any
extensions or renewals thereof, and neither the Pledgor nor Pledgee shall
encumber or dispose of such Collateral except in accordance with the provisions
of this Pledge Agreement.

          B. Pledgor's Representations and Covenants. To induce Pledgee to enter
into this Pledge Agreement, Pledgor represents and covenants to Pledgee, its
successors and assigns, as follows:

               1. Payment of Indebtedness. Pledgor will pay the principal sum of
the Non-Recourse Note secured hereby, together with interest thereon, at the
time and in the manner provided in the Non-Recourse Note. Pledgee agrees that
the obligation of Pledgor under the Non-Recourse Note shall be non-recourse to
Pledgor.

               2. Encumbrances. The Shares are free of all other encumbrances,
defenses and liens, except for the encumbrances of Pledgee and those listed on
Certificates Nos. 29 & 30. Pledgor will not further encumber the Shares without
the prior written consent of Pledgee.

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               3. Margin Regulations. Pledgor and Pledgee shall comply with all
applicable rules and regulations promulgated by the Federal Reserve Board.

          C. Voting Rights. During the term of this pledge and so long as
Pledgor is not in default under this Pledge Agreement, Pledgor shall have the
right to vote all of the Shares pledged hereunder.

          D. Stock Adjustments. In the event that during the term of the pledge
any stock dividend, reclassification, readjustment or other changes are declared
or made in the capital structure of Pledgee, all new, substituted and additional
shares or other securities issued by reason of any such change shall be
delivered to and held by the Pledgee under the terms of this Pledge Agreement in
the same manner as the Shares originally pledged hereunder. In the event of
substitution of such securities, Pledgor and Pledgee shall cooperate and execute
such documents as are reasonable so as to provide for the substitution of such
Collateral and, upon such substitution, references to "Shares" in this Pledge
Agreement shall include the substituted shares of capital stock of Pledgor as a
result thereof.

          E. Options and Rights. In the event that, during the term of this
pledge, subscription options or other rights or options shall be issued in
connection with the pledged Shares, such rights and options shall be the
property of Pledgor and, if exercised by Pledgor, all new stock or other
securities so acquired by Pledgor as it relates to the pledged Shares then held
by Pledgee shall be immediately delivered to Pledgee, to be held under the terms
of this Pledge Agreement in the same manner as the Shares pledged.

          F. Default. Pledgor shall be deemed to be in default under the
Non-Recourse Note and of this Pledge Agreement in the event:

               1. Payment of principal on the Non-Recourse Note shall be
          delinquent for a period of thirty (30) days or more after the due date
          of the Non-Recourse Note or any extension or renewal thereof; or

               2. Pledgor fails to perform any of the covenants set forth in
          this Pledge Agreement for a period of ten (10) days after written
          notice thereof from Pledgee, and Pledgor fails to remedy such
          failure(s) within such 10-day period.

          In the case of an event of a default, as set forth above, Pledgee
shall have the right to accelerate payment of the Non-Recourse Note upon written
notice to Pledgor, and Pledgee shall thereafter be entitled to proceed only
against the Collateral securing the Non-Recourse Note; provided, however, in the
case of an event of default under Paragraphs B.2 (Encumbrances), D. (Stock
Adjustments) or E. (Options and Rights) hereof, Pledgee shall thereafter be
entitled to pursue its remedies under the Massachusetts Uniform Commercial Code.

          G. Release of Collateral. Subject to any applicable contrary
applicable regulations, there shall be released from this pledge a portion of
the pledged Shares held by Pledgee hereunder upon payment of the principal of
the Non-Recourse Note. The number of the pledged Shares which shall be released
shall be that number of full Shares which bears the same proportion to the
initial number of Shares pledged hereunder as the payment of principal bears to
the initial full principal amount of the Non-Recourse Note.

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          H. Withdrawal or Substitution of Collateral. Pledgor shall not sell,
withdraw, pledge, substitute or otherwise dispose of all or any part of the
Collateral without the prior written consent of Pledgee, which shall make
specific reference to this Agreement.

          I. Term. The within pledge of Shares shall continue until the payment
of all indebtedness secured hereby, at which time the remaining Collateral shall
be promptly delivered to Pledgor, subject to the provisions for prior release of
a portion of the Collateral as provided in paragraph G above.

          J. Insolvency. Pledgor agrees that if a bankruptcy or insolvency
proceeding is instituted by or against him, or if a receiver is appointed for
the property of Pledgor, or if Pledgor makes an assignment for the benefit of
creditors, the entire amount unpaid on the Note shall become immediately due and
payable, and Pledgee may proceed as provided in the case of default only against
the Collateral securing the Non-Recourse Note.

          K. Invalidity of Particular Provisions. Pledgor and Pledgee agree that
the enforceability or invalidity of any provision or provisions of this Pledge
Agreement shall not render any other provision or provisions herein contained
unenforceable or invalid.

          L. Successors or Assigns. Pledgor and Pledgee agree that all of the
terms of this Pledge Agreement shall be binding on their respective successors
and assigns, and that the term "Pledgor" and the term "Pledgee" as used herein
shall be deemed to include, for all purposes, the respective designees,
successors, assigns, heirs, executors and administrators; provided, however,
nothing contained in this Paragraph L shall make, or be construed to make, the
Non-Recourse Note recourse to Pledgor's estate or heirs.

          M. Governing Law. This Pledge Agreement shall be interpreted and
governed under the laws of the Commonwealth of Massachusetts, without giving
effect to choice of law principles thereof.

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          IN WITNESS WHEREOF, the parties hereto have executed this Pledge
Agreement as of the day and year first above written.

"PLEDGOR"                               By: /s/ Robert A. Blair
                                            ------------------------------------
                                            Robert A. Blair
                                        Address: 4936 Rodman Street, N.W.
                                                 Washington, DC 20016

"PLEDGEE"                               IPG PHOTONICS CORPORATION

                                        By: /s/ Valentin P. Gapontsev
                                            ------------------------------------
                                        Name: Valentin P. Gapontsev
                                        Title: CEO and Chairman of the Board

                                        4<PAGE>

                                                                   EXHIBIT 10.39

                                PLEDGE AGREEMENT

          This Pledge Agreement is made as of April 13, 2001 between IPG
Photonics Corporation, a Delaware corporation ("Pledgee"), and John H. Dalton
("Pledgor").

                                    Recitals

          The Pledgee has agreed to make a loan to Pledgor in the amount of
$150,000 in connection with the exercise of employee stock options and the
ownership of such shares by Pledgor, which loan is evidenced by a promissory
note from Pledgee in favor of Pledgor, dated the date hereof (the "Note").

          As a condition of making such a loan, Pledgee requires that the
Pledgor pledges an aggregate of 75,000 shares of Common Stock of IPG Photonics
Corporation now owned by Pledgor.

          NOW, THEREFORE, it is agreed as follows:

          A. Creation and Description of Pledge Interest. In consideration of
the above loan by Pledgee to Pledgor, Pledgor, pursuant to the Massachusetts
Uniform Commercial Code, hereby pledges all of such Shares (herein sometimes
referred to as the "Collateral") represented by certificate number ___, duly
endorsed in blank or with executed stock powers, and herewith delivers said
certificate to Pledgee, who shall hold said certificate subject to the terms and
conditions of this Pledge Agreement.

          The Collateral (together with an executed blank stock assignment for
use in transferring title to all or a portion of the Shares to Pledgee if, as
and when required pursuant to this Pledge Agreement) shall be held by the
Pledgee as security for the repayment of the Note, and any extensions or
renewals thereof, and neither the Pledgor nor Pledgee shall encumber or dispose
of such Collateral except in accordance with the provisions of this Pledge
Agreement.

          B. Pledgor's Representations and Covenants. To induce Pledgee to enter
into this Pledge Agreement, Pledgor represents and covenants to Pledgee, its
successors and assigns, as follows:

               1. Payment of Indebtedness. Pledgor will pay the principal sum of
the Note secured hereby, together with interest thereon, at the time and in the
manner provided in the Note.

               2. Encumbrances. The Shares are free of all other encumbrances,
defenses and liens, and Pledgor will not further encumber the Shares without the
prior written consent of Pledgee.

               3. Margin Regulations. In the event that Pledgee's Common Stock
is now or later becomes margin-listed by the Federal Reserve Board and Pledgee
is classified as a "lender" within the meaning of the regulations under Part 207
of Title 12 of the Code of Federal Regulations ("Regulation G"), Pledgor agrees
to cooperate with Pledgee in making any

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amendments to the Note or providing any additional collateral as may be
necessary to comply with such regulations.

          C. Voting Rights. During the term of this pledge and so long as all
payments of principal and interest are made as they become due under the terms
of the Note, Pledgor shall have the right to vote all of the Shares pledged
hereunder.

          D. Stock Adjustments. In the event that during the term of the pledge
any stock dividend, reclassification, readjustment or other changes are declared
or made in the capital structure of Pledgee, all new, substituted and additional
shares or other securities issued by reason of any such change shall be
delivered to and held by the Pledgee under the terms of this Pledge Agreement in
the same manner as the Shares originally pledged hereunder. In the event of
substitution of such securities, Pledgor and Pledgee shall cooperate and execute
such documents as are reasonable so as to provide for the substitution of such
Collateral and, upon such substitution, references to "Shares" in this Pledge
Agreement shall include the substituted shares of capital stock of Pledgor as a
result thereof.

          E. Options and Rights. In the event that, during the term of this
pledge, subscription options or other rights or options shall be issued in
connection with the pledged Shares, such rights and options shall be the
property of Pledgor and, if exercised by Pledgor, all new stock or other
securities so acquired by Pledgor as it relates to the pledged Shares then held
by Pledgee shall be immediately delivered to Pledgee, to be held under the terms
of this Pledge Agreement in the same manner as the Shares pledged.

          F. Default. Pledgor shall be deemed to be in default of the Note and
of this Pledge Agreement in the event:

               1. Payment of principal or interest on the Note shall be
          delinquent for a period of ten (10) days or more;

               2. Pledgor fails to perform any of the covenants set forth in
          this Pledge Agreement for a period of ten (10) days after written
          notice thereof from Pledgee; or

               3. Pledgor ceases to be an employee of Pledgee for the following
          reasons:

                    a. The Pledgee reasonably determines in its discretion that
               Pledgor has been materially negligent in the performance of, or
               materially fails to perform, Pledgor's duties, or has failed to
               comply with the reasonable and material directions of the
               Pledgee, provided that the Pledgee has given Pledgor written
               notice of the deficiencies in performance or failure to comply
               and Pledgor has failed within thirty (30) days after service of
               such notice to cure such deficiencies to the Pledgee's
               satisfaction; or

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                    b. The determination by the Pledgee in the exercise of its
               reasonable judgment that Pledgor has committed an act or acts
               constituting material dishonesty or fraud with respect to the
               Pledgee, or Pledgor has been convicted of, admits to, or enters a
               plea of nolo contendere to a felony or any crime involving moral
               turpitude; or

               4. In the event of Pledgor's termination of employment with the
          Company for any reason other than the following:

                    a. The assignment to Pledgor of any duties materially
               inconsistent (except in the nature of a promotion) with Pledgor's
               position in the Pledgee or a substantial adverse alteration in
               the nature of Pledgor's position or responsibilities or in the
               conditions of employment;

                    b. A reduction by the Pledgee in Pledgor's then-current
               salary or a material reduction in benefits;

                    c. A termination of employment with the Company without
               cause; or

               5. The declaration of or filing for bankruptcy or insolvency by
          the Maker.

          In the case of an event of Default, as set forth above, Pledgee shall
have the right to accelerate payment of the Note upon notice to Pledgor, and
Pledgee shall thereafter be entitled to pursue its remedies under the
Massachusetts Uniform Commercial Code.

          G. Release of Collateral. Subject to any applicable contrary rules
under Regulation G, there shall be released from this pledge a portion of the
pledged Shares held by Pledgeholder hereunder upon payments of the principal of
the Note. The number of the pledged Shares which shall be released shall be that
number of full Shares which bears the same proportion to the initial number of
Shares pledged hereunder as the payment of principal bears to the initial full
principal amount of the Note.

          H. Withdrawal or Substitution of Collateral. Pledgor shall not sell,
withdraw, pledge, substitute or otherwise dispose of all or any part of the
Collateral without the prior written consent of Pledgee, which shall make
specific reference to this Agreement.

          I. Term. The within pledge of Shares shall continue until the payment
of all indebtedness secured hereby, at which time the remaining Collateral shall
be promptly delivered to Pledgor, subject to the provisions for prior release of
a portion of the Collateral as provided in paragraph G above.

          J. Insolvency. Pledgor agrees that if a bankruptcy or insolvency
proceeding is instituted by or against him, or if a receiver is appointed for
the property of Pledgor, or if Pledgor makes an assignment for the benefit of
creditors, the entire amount unpaid on the Note shall become

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immediately due and payable, and Pledgee may proceed as provided in the case of
default.

          K. Invalidity of Particular Provisions. Pledgor and Pledgee agree that
the enforceability or invalidity of any provision or provisions of this Pledge
Agreement shall not render any other provision or provisions herein contained
unenforceable or invalid.

          L. Successors or Assigns. Pledgor and Pledgee agree that all of the
terms of this Pledge Agreement shall be binding on their respective successors
and assigns, and that the term "Pledgor" and the term "Pledgee" as used herein
shall be deemed to include, for all purposes, the respective designees,
successors, assigns, heirs, executors and administrators.

          M. Governing Law. This Pledge Agreement shall be interpreted and
governed under the laws of the State of Massachusetts, without giving effect to
choice of law principles thereof.

          IN WITNESS WHEREOF, the parties hereto have executed this Pledge
Agreement as of the day and year first above written.

"PLEDGOR"                               By: /s/ John H. Dalton
                                            ------------------------------------
                                            John H. Dalton
                                        Address: 3710 University Ave., NW
                                                 Washington, DC 20016

"PLEDGEE"                               IPG PHOTONICS CORPORATION

                                        By: /s/ Valentin P. Gapontsev
                                            ------------------------------------
                                        Name: Valentin P. Gapontsev
                                        Title: CEO and Chairman of the Board

                                        4

<PAGE>

                       FIRST AMENDMENT TO PLEDGE AGREEMENT

          This FIRST AMENDMENT TO PLEDGE AGREEMENT is made as of September 30,
2003 between IPG Photonics Corporation, a Delaware corporation ("Pledgee"), and
John H. Dalton ("Pledgor").

                                    Recitals

          Pledgee has made a loan to Pledgor in the amount of $150,000 to
purchase Common Stock of the Pledgee, which loan is evidenced by the Promissory
Note from Pledgor in favor of Pledgee, dated as of April 13, 2001, which
Promissory Note was amended and restated pursuant to the Amended and Restated
Promissory Note, having a maturity date of December 31, 2004 (collectively, the
"Note").

          Pledgor and Pledgee have agreed to modify the Note pursuant to the
Non-Recourse Promissory Note, dated the date hereof, in the principal amount of
$172,719 (the "Reissued Note"), which supersedes and replaces the Note.

          Pledgor and Pledgee have entered into a Pledge Agreement, dated as of
April 13, 2001 (the "Pledge Agreement"), under which Pledgor pledged to Pledgee
75,000 shares of Common Stock of IPG Photonics Corporation owned by Pledgor.
Plegdor and Pledgee have agreed to modify the Pledge Agreement in connection
with the issuance of the Reissued Note.

          NOW, THEREFORE, it is agreed as follows:

          Except as expressly modified by this First Amendment to Pledge
Agreement, the Pledge Agreement shall remain in full force and effect. All
capitalized terms in this First Amendment to Pledge Agreement shall have the
meanings given to them in the Pledge Agreement, unless otherwise defined herein.

          The first recital shall be replaced in its entirety as follows:

               The Pledgee has agreed to make a loan to Pledgor in the amount of
               $172,719 in connection with the exercise of employee stock
               options and the ownership of such shares by Pledgor, which loan
               is evidenced by the Non-Recourse Promissory Note from Pledgee in
               favor of Pledgor, dated September 30, 2003, in the principal
               amount of $172,719 (the "Note"), which supersedes and replaces
               the Promissory Note from Pledgor in favor of Pledgee, dated April
               13, 2001, in the principal amount of $150,000, which Promissory
               Note was amended and restated pursuant to the Amended and
               Restated Promissory Note, dated April 13, 2001, in the principal
               amount of $150,000 and having a maturity date of December 31,
               2004.

          Pledgor and Pledgee agree that all of the terms of the Pledge
Agreement, as amended, shall be binding on their respective successors and
assigns, and that the term "Pledgor" and the term "Pledgee" as used herein shall
be deemed to include, for all purposes, the respective designees, successors,
assigns, heirs, executors and administrators.

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          This First Amendment to Pledge Agreement shall be interpreted and
governed under the laws of the State of Massachusetts, without giving effect to
choice of law principles thereof.

          IN WITNESS WHEREOF, the parties hereto have executed this First
Amendment to Pledge Agreement as of the day and year first above written.

"PLEDGOR"                               By: /s/ John H. Dalton
                                            ------------------------------------
                                            John H. Dalton
                                        Address: 3710 University Ave., NW
                                                 Washington, DC 20016

"PLEDGEE"                               IPG PHOTONICS CORPORATION

                                        By: /s/ Timothy P.V. Mammen
                                            ------------------------------------
                                            Timothy P.V. Mammen

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