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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001111928-07-000066.txt : 20071024
<SEC-HEADER>0001111928-07-000066.hdr.sgml : 20071024
<ACCEPTANCE-DATETIME>20071024172942
ACCESSION NUMBER:		0001111928-07-000066
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071022
FILED AS OF DATE:		20071024
DATE AS OF CHANGE:		20071024

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:		071188844

	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>2007-10-22</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>2007-10-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>14400</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.63</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8146602</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>9100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.21</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8137502</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 $20.01 to $21.36 as follows:  100 shares at $20.01; 100 shares at $20.03; 200 shares at $20.04; 200 shares at $20.06; 300 shares at $20.07; 100 shares at $20.08; 100 shares at $20.09; 200 shares at $20.10; 100 shares at $20.12; 100 shares at $20.14; 700 shares at $20.25; 200 shares at $20.26; 300 shares at $20.30; 100 shares $20.31; 200 shares at $20.38; 200 shares $20.50; 200 shares at $20.52; 200 shares at $20.53; 100 shares at $20.56; 100 shares at $20.57; 100 shares at $20.58; 300 shares at $20.59; 200 shares at $20.60; 200 shares at $20.61; 123 shares at $20.62; 300 shares at $20.64; 200 shares at $20.65; 300 shares at $20.66; 177 shares at $20.67; 200 shares at $20.68; 1,100 shares at $20.70; 1,100 shares at $20.71; 300 shares at $20.72; 200 shares at $20.73; 200 shares at $20.74; 612 shares at $20.75; 100 shares at $20.76; 200 shares at $20.78; 100 shares at $20.79; 1,388 shares at $20.80; 200 shares at $20.81; 900 shares at $20.82.  Cont. Footnote 3.</footn
ote>
        <footnote id="F3">600 shares at $20.83; 698 shares at $20.85; 200 shares at $20.89; 400 shares at $20.90; 2 shares at $20.92; 30 shares at $21.32; 100 shares at $21.34; and 70 shares at $21.36.</footnote>
        <footnote id="F4">Sales ranged from $19.96 to $20.62 as follows:  200 shares at $19.96; 1,293 shares at $20.06; 100 shares at $20.07; 400 shares at $20.08; 400 shares at $20.09; 407 shares at $20.10; 200 shares at $20.11; 500 shares at $20.12; 200 shares at $20.13; 300 shares at $20.14; 200 shares at $20.145; 100 shares at $20.15; 100 shares at $20.16; 300 shares at $20.17; 74 shares at $20.18; 100 shares at $20.199; 100 shares at $20.20; 100 shares at $20.21; 100 shares at $20.22; 900 shares at $20.24; 526 shares at $20.25; 100 shares at $20.255; 183 shares at $20.26; 17 shares at $20.27; 100 shares at $20.294; 200 shares at $20.30; 300 shares at $20.37; 88 shares at $20.39; 112 shares at $20.40; 200 shares at $20.41; 100 shares at $20.42; 100 shares at $20.43; 200 shares at $20.44; 200 shares at $20.46; 100 shares at $20.53; 100 shares at $20.545; 100 shares at $20.59; 200 shares at $20.60; and 100 shares at $20.62.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Angelo P. Lopresti, Attorney-in-fact</signatureName>
        <signatureDate>2007-10-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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