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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001111928-07-000022.txt : 20070926
<SEC-HEADER>0001111928-07-000022.hdr.sgml : 20070926
<ACCEPTANCE-DATETIME>20070926152451
ACCESSION NUMBER:		0001111928-07-000022
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070924
FILED AS OF DATE:		20070926
DATE AS OF CHANGE:		20070926

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IPG PHOTONICS CORP
		CENTRAL INDEX KEY:			0001111928
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				043444218
		STATE OF INCORPORATION:			DE

	BUSINESS ADDRESS:	
		STREET 1:		50 OLD WEBSTER ROAD
		CITY:			OXFORD
		STATE:			MA
		ZIP:			01540
		BUSINESS PHONE:		5083731100

	MAIL ADDRESS:	
		STREET 1:		50 OLD WEBSTER ROAD
		CITY:			OXFORD
		STATE:			MA
		ZIP:			01540

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GAPONTSEV VALENTIN P
		CENTRAL INDEX KEY:			0001130421

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33155
		FILM NUMBER:		071136502

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		5083476800

	MAIL ADDRESS:	
		STREET 1:		660 MAIN STREET
		CITY:			STURBRIDGE
		STATE:			MA
		ZIP:			01566
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-09-24</periodOfReport>

    <issuer>
        <issuerCik>0001111928</issuerCik>
        <issuerName>IPG PHOTONICS CORP</issuerName>
        <issuerTradingSymbol>IPGP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001130421</rptOwnerCik>
            <rptOwnerName>GAPONTSEV VALENTIN P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O IPG PHOTONICS CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>50 OLD WEBSTER ROAD</rptOwnerStreet2>
            <rptOwnerCity>OXFORD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01540</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO &amp; Chairman of the Board</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-09-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8747</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.7315</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11786494</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-09-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>17319</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.7315</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8186684</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through IP Fibre Devices (UK) Ltd.</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-09-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7919</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.814</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11778575</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 23, 2007.</footnote>
        <footnote id="F2">Sales ranged from $18.25 to $18.97 as follows:  26 shares at $18.25; 101 shares at $18.29; 59 shares at $18.30; 24 shares at $18.31; 201 shares at $18.32; 67 shares at $18.33; 34 shares at $18.36; 34 shares at $18.40; 34 shares at $18.46; 430 shares at $18.50; 166 shares at $18.51; 101 shares at $18.52; 18 shares at $18.53; 101 shares at $18.55; 67 shares at $18.56; 34 shares at $18.57; 110 shares at $18.58; 159 shares at $18.59; 302 shares at $18.61; 336 shares at $18.63; 268 shares at $18.64; 34 shares at $18.65; 470 shares at $18.69; 161 shares at $18.70; 67 shares at $18.71; 336 shares at $18.72; 168 shares at $18.73; 34 shares at $18.74; 869 shares at $18.75; 34 shares at $18.76; 267 shares at $18.77; 33 shares at $18.7750; 101 shares at $18.78; 67 shares at $18.79; 201 shares at $18.80; 235 shares at $18.81; 67 shares at $18.83; 67 shares at $18.84; 336 shares at $18.85; 168 shares at $18.86--Continued in Footnote (3).</footnote>
        <footnote id="F3">Continued from Footnote (2):  155 shares at $18.87; 34 shares at $18.8750; 68 shares at $18.88; 134 shares at $18.89; 201 shares at $18.90; 101 shares at $18.91; 470 shares at $18.92; 171 shares at $18.93; 476 shares at $18.94; 67 shares at $18.9450; 134 shares at $18.95; 168 shares at $18.9550; 147 at $18.96; 34 shares at $18.97.</footnote>
        <footnote id="F4">Sales ranged from $18.62 to $18.94 as follows:  34 shares at $18.62; 67 shares at $18.64; 201 shares at $18.65; 101 shares at $18.67; 34 shares at $18.68; 470 shares at $18.69; 168 shares at $18.70; 3 shares at $18.71; 336 shares at $18.72; 107 shares at $18.73; 161 shares at $18.74; 435 shares at $18.75; 67 shares at $18.76; 201 shares at $18.78; 403 shares at $18.79; 235 shares at $18.80; 336 shares at $18.81; 973 shares at $18.82; 134 shares at $18.83; 302 shares at $18.84; 235 shares at $18.85; 34 shares at $18.86; 839 shares at $18.87; 470 shares at $18.88; 97 shares at $18.89; 771 shares at $18.90; 235 shares at $18.91; 302 shares at $18.92; 67 shares at $18.93; 34 shares at $18.95; 67 shares at $18.94.</footnote>
        <footnote id="F5">The reporting person is the managing director of IP Fibre Devices (UK) Ltd. and has voting and investment power with respect to the shares held of record by IP Fibre Devices (UK) Ltd.  The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of the beneficial ownership of all the reported shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Angelo P. Lopresti, Attorney-in-fact</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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