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<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001391636</cik>
        <entityName>CYAN OPTICS INC</entityName>
        <issuerAddress>
            <street1>1390 N MCDOWELL BLVD., SUITE G-327</street1>
            <city>PETALUMA</city>
            <stateOrCountry>CA</stateOrCountry>
            <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
            <zipCode>94954</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>707-735-2300</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2006</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <lastName>Hatfield</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Steve</firstName>
                <lastName>West</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Eric</firstName>
                <lastName>Clelland</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Frank</firstName>
                <lastName>Wiener</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Norm</firstName>
                <lastName>Foust</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tom</firstName>
                <lastName>Scannell</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Mr. Scannell is an independent contractor serving as the Company's interim Chief Financial Officer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Rick</firstName>
                <lastName>Johnston</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Promod</firstName>
                <lastName>Haque</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Norwest Venture Partners</street1>
                <street2>525 University Ave., Suite 800</street2>
                <city>Palo Alto</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94301</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Paul</firstName>
                <lastName>Ferris</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Azure Capital Partners</street1>
                <street2>650 California St., 11th Floor</street2>
                <city>San Francisco</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94108</zipCode>
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                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <lastName>Floyd</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Niel</firstName>
                <lastName>Ransom</lastName>
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            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
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                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Stewart</firstName>
                <lastName>Gollmer</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Tenaya Capital</street1>
                <street2>3000 Sand Hill Road, Building 3, Ste.190</street2>
                <city>Menlo Park</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94025</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tom</firstName>
                <lastName>Corker</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Cyan Optics, Inc.</street1>
                <street2>1390 N. McDowell Blvd., Suite G-327</street2>
                <city>Petaluma</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94954</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Telecommunications</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-11-19</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Offering of Series E Preferred Stock (&quot;Series E&quot;) and the underlying shares of Common Stock issuable upon conversion of Series E</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>30000028</totalOfferingAmount>
            <totalAmountSold>30000028</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>19</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>Proceeds are intended to be used for general corporate purposes, including the payment of salaries and other compensation to employees and other service providers.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>CYAN OPTICS INC</issuerName>
                <signatureName>/s/ Michael Hatfield</signatureName>
                <nameOfSigner>Michael Hatfield</nameOfSigner>
                <signatureTitle>President and CEO</signatureTitle>
                <signatureDate>2010-12-01</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
