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1、OpticalTransceiversAuthor:Sujing2010.08.05DefinitionandFunctionOpticalmoduleisthedevicewhichconvertercoopersignaltoopticalsignal,andviceversa.Itisthemaindeviceinopticaltelecommunication.OpticaltelecommunicationsystemStandarddigitalopticalsystemThemostsimplyopticalsyste
2、mOpticalTransceiversSurvey:Aopticalmodulecombinedby3parts:OSA,electronicdeviceandopticalconnector.光发射部分由驱动电路、控制电路(如APC、ATC)、光源三部分构成,具有发射禁止和监视输出等功能。光接收部分主要由PIN-TIA前放组件和主放电路两部分组成,并具有无光告警(LOS)功能。TelecommunicationnetSeewhereituse.?FTTX,FTTH,FTTP……Fiber-to-the-x(FTTx)(FTTx,
3、x=Hforhome,Pforpremises,CforcurbandNfornodeorneighborhood)ClassificationbytransmissionmediumSinglemodetransceiverMultimodetransceiverFiberstructureThemaincontainoffiberishighpuritySiO2.Andwithsomeothermaterialswithveryfewquantity,inordertoenhancethereflection.Multimode
4、FiberTwostandardofMultimodefiberis62.5/125µmand50/125µm;62.5&50referstothediameterofferrules.125refersthediameterwithcoating.Multimodefiberonlyuseonlesscapacityandshortdistancetransmission.SinglemodeFiberWhenFerrulesdiameterisbetween5~10µm(9/125),thefibercanonlyallowon
5、emethodtransmission,soSMfibernothastheproblemofChromaticdispersion,itspeciallyuseinhighercapacityandlongdistancetransmission.TransmissionformofSMandMMfibergradedindexmultimodefiberstepIndexmultimodefiberSMFiberTransceiverPrinciplemapTransmitterPECLinput(lowspeed)CMLinp
6、ut(highspeed)LasermodulatorTempcompensationelectricitycircuitDatainputLaserLaserdriverandAPCElectricitycircuitVccDDMMonitoryinput/outputReceiverLPFRestrictionamplifierSignalelectricitycircuitPDDataoutputDDMPECLbufferFirstputbufferTypesofTransceiverBypackage:1X9、SFF、GBI
7、C、SFP、SFP+、XFP、X2、XENPAK、PON…...Products:SFPSFP---SmallFormFactorPluggable,alsonamedmini-GBIC.TheadvantageofSFPishotpluggable,smallsize,andmetalcasing.Products:1×9Plasticcasing,9PINonthebottom,mainlyuseontheproductionofMediaconverterandVDOmultiplexor.SFFSmallFormFactor
8、,metalcasing,2x5or2x10PINonthebottom,mainlyuseonSDH,SONET,fastEthernetandFiberChannel.GBICGigabitInterfaceConverter,m