1、Bi-Directional Optical Sub-Assembly,光发射接收组件LD:Laser Diode,激光二极管PD:Photo-Diode,光电二极管FP:Fabry-Perot,法布里-珀罗激光二极管DFB:Distributed Feedback Laser,分布反馈式激光二极管VCSEL:Vertical Cavity Surface Emitting Laser,垂直腔面发射激光器PIN:Positive Intrinsic Negative,同质PN结光电二极管APD:Avalanche Photo-Diode,雪崩光电二极管TIA:Transimpedance Am
2、plifier,跨阻放大器TO-can:A kind of package method for active componentOLT:Optical Line Termination光线路终端ONU:Optical Network Unit光网络单元SDH:Synchronous Digital Hierarchy,同步数字体系SONET:Synchronous Optical Network,光同步网络GBE:Gigabit Ethernet,千兆以太网4ITU&IEEEIEEE(Institute of Electrical and Electronic,電氣及電子工程師學會)IEEE
3、 802(IEEE 802 series of standards for Local Area Networks,電氣及電子工程師學會802系列標準)GE-PON Gigabit Ethernet,1.25GbpsITU(International Telecommunications Union,國際電信聯盟)ITU-T(ITU Telecommunications Standard Sector,國際電信聯盟電信標準化部門)A-PON ATM,155Mbps B-PON Broadband,622Mbps G-PON Gigabit,1.25Gbps5SONET/SDH Transmis
4、sion Rate6PON ConceptPON(Passive Optical Network无源光网络)技术是一种点对多点点对多点的光纤传输和接入技术;下行采用广播方式、上行采用时分多址方式,可以灵活地组成树型、星型、总线型等拓扑结构;在光分支点不需要节点设备,只需要安装一个简单的无源光分路器,光信号在传输过程中不再经过放大和再生,网络的分路由光分路器来实现。71550 DFBVoice+Data(continuous)ONUUp stream(burst)Video(analog)PDmoduleDFB LDmoduleAPD moduleDFB LDmodulePIN-TIALDDua
5、l-bandFWDMTri-bandFWDM1x8Splitter1x4SplitterTri-bandFWDMBOSAUp stream(burst)Video(analog)Voice+Data(continuous)1490 DFB1310 FPPON 系統示意圖OLT81550 DFBVoice+Data(continuous)ONUUp stream(burst)Video(analog)PDmoduleDFB LDmodulePIN-TIALDTri-bandFWDM1x8Splitter1x4SplitterTri-bandFWDMBOSAUp stream(burst)Vide
6、o(analog)Voice+Data(continuous)1490 DFB1310 FPPDLDBOSA91550 DFBVoice+Data(continuous)ONTUp stream(burst)Video(analog)DFB LDmoduleAPD moduleDFB LDmodulePIN-TIALDDual-bandFWDMTri-bandFWDM1x8Splitter1x4SplitterUp stream(burst)Video(analog)Voice+Data(continuous)1490 DFB1310 FPAnalog PDTriplexer10PON 系統元
7、件MELCO B-PON Product11PON Application12Media Converter 系統架構(P2P)100Mbps131550nm1310nm45 filter45 filterTxRxTxRxReceptacle BOSAPigtail BOSAMedia Converter 系統示意圖14光路示意图LDPDFilterFiberConnector1490nm PIN-TIA1310nmLaser Diode1550nm Photodiode12356(1490nm)(1550nm)(1310nm)415BOSA基本结构LD To-CanEngine BasePi
8、gtail HolderFilterPD To-CanFilter HolderPigtail16(2)相關元器件介紹17器件分類Active ComponentPassive ComponentMetal&Plastic Housing18Active Component主動元件(coaxial type)上游中游下游chip chipTO-canTOSA/ROSA LD moduleTransceiver End user,Sub-system,System(Butterfly,Pigtail,Receptacle)主動元件(rectangular type)(Packaging)19LD
9、 TO-canCap(Aspherical/ball Lens)Header(Stem)ChipMonitor PDSubmount20TOSA基本结构SiOBLens cap with 8O facetHeaderZ-BushingReceptacleIsolatorLensWindow-capPD ChipLD ChipFiber StubSplit SleevePD SubmountPD ChipLD ChipLD SubmountHeader+SiOB+LD Chip+PD Chip+Cap=To-CanTo-Can+Isolator+Z-Bushing+Receptacle=TOSA
10、To-Can21TOSA/ROSA常见问题介绍(To-Can)镀金层划伤、缺镀金层划伤、缺损或粘有焊锡等损或粘有焊锡等管脚粘有焊锡或管脚粘有焊锡或镀金层缺损镀金层缺损镀金层氧化镀金层氧化To-Can封盖开缝封盖开缝To-Can封盖焊带封盖焊带缺陷缺陷To-Can Cap玻璃玻璃开裂开裂BATo-Can玻璃封装玻璃封装碎裂或脱落碎裂或脱落To-Can玻璃封装玻璃封装碎裂或脱落碎裂或脱落22Caps characteristic23TO-56FTO-56B24TO-56CTO-56A25Offset design of TO-can26Coupling Characteristics of Off
11、set27PINPDPD-PD+VpdGND应用:Triplexer,PD module28PIN-TIA(4pin)DataDataVccGNDPD1nFIN1nFFilter应用:GE ONU BOSA,ROSA29PIN-TIA(5pin)DataDataVccGNDPDVpd12543应用:GE PON BOSA,ROSA30APD-TIA DataDataVccGNDAPDVapd12543应用:GE PON OLT,GPON ONU,Triplexer,ROSA31PIN Chip PIN:Positive-Intrinsic-Negative32Real case for PIN
12、s specification33APD ChipAPD:Avalanche PhotoDiode34Real case for APDs specification35Real case for APD in PON applicationResult:X direction 50umY direction 55umZ direction 800um36Passive ComponentFiberFilterLensIsolatorReceptacle37Fiber38Connect typeSC connectLC connectFC/PC connectMU/MUJ connectST
13、connect39Connect typeFC/PCSC/PCFC/APCSC/APC40Fiber Inspection外觀 41Fiber Inspectionn外觀42End較輕微的情況 較為嚴重的情況 43End光芯(core)與覆層(cladding)端面破損次嚴重的情況 44FilterTR0 Edge filter45RTR0 cut-off filer46Isolator47Isolator Inspection484950Metal&Plastic HousingEngine BaseFilter HolderLD Lens HolderPigtail Holder51(3)
14、OSA製程注意事項 AssemblyLaser WeldingPD AlignmentTesting52BOSA关键工艺简介Filter Assembly滤波片装配滤波片装配LD AssemblyLD To-Can装配装配PD AlignPD耦合耦合Laser Welding激光点焊激光点焊53Assembly Filter有正反之分 Filter有入射角的限制 Lens需注意L1的距離 LD TO Pin根部的保護 膠的保存條件及固化顏色54Laser Welding焊点的外观:颜色,位置,大小焊点的剪切力Post Weld shift(20%)55XY laswer weldingZ la
15、swer welding56Defective Laser welding57Defective Laser welding激光焊点开裂激光焊点开裂激光焊点位激光焊点位置过低置过低激光焊点位激光焊点位置过高置过高激光焊点开缝激光焊点开缝激光焊点离激光焊点离Z-Bushing太近太近穿透焊点过浅穿透焊点过浅穿透焊点过深穿透焊点过深焊点变色焊点变色58PD Alignment 輸入光源是否飽和 不帶電帶光插拔TO PD反偏先開再開Vcc TO腳位的正確59TestingOutput PowerTE at low and high temp.Spectrum(WL,width and SMSR)SensitivityOver Load60产品测试项目应用测试项FPPo,Slope,Im,Vf,TE,WL,WidthDFBPo,Slope,Im,Vf,TE,WL,Width,SMSR61If(mA)P(mW)Ith逻辑逻辑1逻辑逻辑0输入电脉冲输入电脉冲IbImIo=Ib+ImPo=(Ib+Im-Ith)/2Po数字调制数字调制If(mA)P(mW)Ith输入电信号输入电信号Io=Ib+ImPo=(Ib-Ith)Po模拟调制模拟调制Ib
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