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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001111928-07-000024.txt : 20070926
<SEC-HEADER>0001111928-07-000024.hdr.sgml : 20070926
<ACCEPTANCE-DATETIME>20070926153813
ACCESSION NUMBER:		0001111928-07-000024
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:			IP FIBRE DEVICES LTD
		CENTRAL INDEX KEY:			0001130423
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33155
		FILM NUMBER:		071136560

	BUSINESS ADDRESS:	
		STREET 1:		C/O IPG PHOTONICS CORP
		STREET 2:		660 MAIN STREET
		CITY:			STURBRIDGE
		STATE:			MA
		ZIP:			01566
		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>0001130423</rptOwnerCik>
            <rptOwnerName>IP FIBRE DEVICES LTD</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </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>17319</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.7315</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8186683</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-09-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15681</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.814</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8171002</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:  52 shares at $18.25; 199 shares at $18.29; 118 shares at $18.30; 49 shares at $18.31; 399 shares at $18.32; 133 shares at $18.33; 66 shares at $18.36; 66 shares at $18.40; 66 shares at $18.46; 852 shares at $18.50; 330 shares at $18.51; 199 shares at $18.52; 37 shares at $18.53; 199 shares at $18.55; 134 shares at $18.56; 66 shares at $18.57; 217 shares at $18.58; 314 shares at $18.59; 598 shares at $18.61; 664 shares at $18.63; 532 shares at $18.64; 66 shares at $18.65; 930 shares at $18.69; 319 shares at $18.70; 133 shares at $18.71; 664 shares at $18.72; 332 shares at $18.73; 66 shares at $18.74; 1,721 shares at $18.75; 66 shares at $18.76; 533 shares at $18.77; 67 shares at $18.7750; 199 shares at $18.78; 133 shares at $18.79; 399 shares at $18.80; 465 shares at $18.81; 133 shares at $18.83; 133 shares at $18.84; 664 shares at $18.85; 332 shares at $18.86; 307 shares $18.87--Continued in Footnote (3).</footnote>
        <footnote id="F3">Continued from Footnote (2):  66 shares at $18.8750; 136 shares at $18.88; 266 shares at $18.89; 399 shares at $18.90; 199 shares at $18.91; 930 shares at $18.92; 339 shares at $18.93; 944 shares at $18.94; 133 shares at $18.9450; 266 shares at $18.95; 332 shares at $18.9550; 291 shares at $18.96; 66 shares at $18.97.</footnote>
        <footnote id="F4">Sales ranged from $18.62 to $18.94 as follows:  66 shares at $18.62; 133 shares at $18.64; 399 shares at $18.65; 199 shares at $18.67; 66 shares at $18.68; 930 shares at $18.69; 332 shares at $18.70; 7 shares at $18.71; 664 shares at $18.72; 214 shares at $18.73; 318 shares at $18.74; 865 shares at $18.75; 133 shares at $18.76; 399 shares at $18.78; 797 shares at $18.79; 465 shares at $18.80; 664 shares at $18.81; 1,927 shares at $18.82; 266 shares at $18.83; 598 shares at $18.84; 465 shares at $18.85; 66 shares at $18.86; 1,661 shares at $18.87; 930 shares at $18.88; 193 shares at $18.89; 1,528 shares at $18.90; 466 shares at $18.91; 598 shares at $18.92; 133 shares at $18.93; 66 shares at $18.95; 133 shares at $18.94.</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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