OMA-Proposal

OMAProposalMikeDudek,CieloCommunicationsWhatIsOMA?OPTICALMODULATIONAMPLITUDEOMA=Phigh-PlowPhighPlowWhyOMAWorksRxisACCoupled,performanceisdeterminedbythedifferencebetweenopticalhighandopticallowPavgonlyimportantforEYESafetyandRxOverload:–PavgRxOverload–PavgEyeSafetyWhySpecifyOMA“Morefreedomtosetbiasandmodulationcurrentsintransmitter!lowercost”–Easiertogetsymmetriceyewithanelectro-absorptionmodulator–Lowerchirp–Reducedturnondelayofdirectlymodulatedlasers–EasiertostaywithinspecificationovertemperatureBiasingabovethresholdhelpsevenforfast,lowturnondelaylasers10Gbps850nmVCSELsBiasedbelowthresholdBiasedabovethresholdIEEE802.3HighSpeedStudyGroup,September1999:CourtesyofGoreStatusinOtherStandardsAdoptedforlatestdraftinFiberChannelAdoptedbyHippi-6400-OptBeingproposedforOIFChangestotheSpecificationEliminatesERspecificationMinimumlaunchpower,Rxsensitivity,stressedRxsensitivitychangedtoOMAMaximumRINspecifiedrelativetoOMApowerAllotherspecificationremainthesame–e.g.MaximumTxlaunchpowerRxOverloadpowerSuggestminimumlaunchpowerisNOTspecifiedasaverageopticalpower(differentfromFiberChannel),sinceit’snotneeded.HowtoMeasure:OMAOMA(P1,P2)=P1-P0OMA(ER,Pavg)=2*Pavg((ER-1)/(ER+1))TIMEOPTICALPOWERP1P0PavgHowtoMeasure:StressedReceiverOMAStressedreceiversensitivity=ANVerticaleyeclosurepenalty[dB]=10log(A0/AN)AN-NominalAmplitudewithoutISIAO-VerticalEyeOpeningWithISIHorizontalEyeClosureMeasuredatAverageOPticalPowerAverageOpticalPower(notnecessarilyateyecrossing)HowtoMeasure:RINOMARIN(OMA)istheSNRofthetransmitteroutputDEVICEUNDERTESTPOLARIZATIONROTORSINGLEMODEFIBEROPTICALELECTRICALCONVERTERAMPLIFIER(OPTIONAL)LOWPASSFILTERPOWERMETERSPLITTERVARIABLEREFLECTORHowtoMeasure:RINOMARIN12(OMA)=10Log[PN/(BW*PM)](dB/Hz)RIN12(OMA)=RINreferredtoOMAPN=ElectricalnoisepowerinWatts(modulationoff)PM=ElectricalsignalpowerinWatts(modulationon)BW=BW(LPfilter)-BW(HighPassDCBlockingcapacitor)[noisebandwidthofmeasuringsystem(Hz)]Changes850nmSerialPMDN/A-125dB/HzRIN179µW-8.5dBmPstressedRxsensitivity(50µmMMF)357µW-5.5dBmPTxmin-125dB/HzN/ARIN(OMA)220µW-7.6dBmPstressedrxsensitivity(62.5µmMMF)64µW-13dBmPsensitivityProposedOMASpec.OldSpec.(MinER=6.5dB)Changesto1310nmSerialPMDN/A-130dB/HzRIN477µW-4dBmPTxmin-130dB/HzN/ARIN(OMA)86µW-11.45dBmPstressedRxsensitivity48µW-14.0dBmPsensitivityProposedOMASpec.OldSpec.(MinER=6dB)Changesto1550nmSerialPMDN/A-140dB/HzRIN917µW-2dBmPTxmin-140dB/HzN/ARINOMA)53µW-14.41dBmPstressedRxsensitivity15µW-20dBmPsensitivityProposedOMASpec.OldSpec.(MinER=8dB)Changesto1310nmWWDMPMDN/A-120dB/HzRIN237µW-7.5dBmPTxmin-120dB/HzN/ARIN(OMA)42µW-15.0dBmPstressedRxSensitivity30µW-16.5dBmPsensitivityProposedOMASpec.OldSpec.(MinER=7dB)Table52-8:TransmitCharacteristicsUnit10GBASE-LR/LWDescriptionGBd10.3215±100ppm9.95328±100ppmSignalingSpeed(range)10GBASE-LR10GBASE-LWnm1290to1330Wavelength(range)ps33Trise/Tfall(max,20-80%responsetime)nm0.4RMSSpectralwidth(max)dB30SideModeSuppressionRatiodB1.0Averagelaunchpower(max)dB/Hz-130RIN(max)dB-30AveragelaunchpowerofOFFtransmitter(max)µW477OpticalModulationAmplitude(min)Table52-9:ReceiverCharacteristicsUnit10GBASE-LR/LWDescriptionGBd10.3215±100ppm9.95328±100ppmSignalingSpeed(range)10GBASE-LR10GBASE-LWnm1290to1330Wavelength(range)dBm1.0Averagereceivepower(max)µW48ReceiveOMAsensitivitydBm12Returnloss(min)µW86StressedreceiveOMAsensitivityMHzReceiveelectrical3dBuppercutofffrequency(max)dB1.71VerticaleyeclosurepenaltyReferences:Donhoweetal.Frojdhetal.://://://://://://:RelevantFC-PIDraftDocument:OMAMeasurementTechniquesT11/00-020v4dpANS–FibreChannel-PhysicalInterface,Rev6.6,AnnexA.5(mW)Pavg(dBm)OperationConditionswithCurrentSpecificationAreaOpenedWithOMA