光模块光纤连接器介绍.ppt
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1、Optical Transceivers,Author:Sujing,Definition and Function,Optical module is the device which converter cooper signal to optical signal,and vice versa.It is the main device in optical telecommunication.,Optical telecommunication system,Standard digital optical system,The most simply optical system,O
2、ptical Transceivers Survey:,A optical module combined by 3 parts:OSA,electronic device and optical connector.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。,Telecommunication net,?,FTTX,FTTH,FTTP,Fiber-to-the-x(FTTx)(FTTx,x=H for home,P for premises,C f
3、or curb and N for node or neighborhood),Classification,by transmission medium Single mode transceiver Multi mode transceiver,Fiber structure,The main contain of fiber is high purity SiO2.And with some other materials with very few quantity,in order to enhance the reflection.,Multimode Fiber,Two stan
4、dard of Multimode fiber is 62.5/125 m and 50/125 m;62.5&50 refers to the diameter of ferrules.125 refers the diameter with coating.Multimode fiber only use on less capacity and short distance transmission.,Singlemode Fiber,When Ferrules diameter is between 510m(9/125),the fiber can only allow one me
5、thod transmission,so SM fiber not has the problem of Chromatic dispersion,it specially use in higher capacity and long distance transmission.,Transmission form of SM and MM fiber,graded index multimode fiber,step Index multimode fiber,SM Fiber,Transceiver Principle map,Transmitter,PECL input(low spe
6、ed)CML input(high speed),Laser modulator,Temp compensation electricity circuit,Data input,Laser,Laser driver and APC Electricity circuit,Vcc,DDM,Monitory input/output,Receiver,LPF,Restriction amplifier,Signal electricity circuit,PD,Data output,DDM,PECLbuffer,First put,buffer,Types of Transceiver,By
7、package:1X9、SFF、GBIC、SFP、SFP+、XFP、X2、XENPAK、PON.,Products:SFP,SFP-Small Form Factor Pluggable,also named mini-GBIC.The advantage of SFP is hot pluggable,small size,and metal casing.,Products:19,Plastic casing,9 PIN on the bottom,mainly use on the production of Media converter and VDO multiplexor.,SF
8、F,Small Form Factor,metal casing,2x5 or 2x10 PIN on the bottom,mainly use on SDH,SONET,fast Ethernet and Fiber Channel.,GBIC,Gigabit Interface Converter,metal casing,mainly use on Gigabit Ethernet switch,hot pluggable.,XFP,10 Gigabit Small Form Factor Pluggable,Metal casing,hot pluggable,applicants
9、in 10G optical telecommunication.,X2,X2,Metal casing,hot pluggable.10G Ethernet.,XENPAK,XENPAK:Metal casing,hot pluggable,10G Ethernet.,PON,PON-passive optical network.There are EPON and GPON;EPON based on IEEE802.3ah,GPON based on ITU-TG.984.So far EPON is mature and GPON is still in developing,(GE
10、PON is EPON),PON,ONU,OLT,ONU is optical net unit,is end user device,OLT is optical line terminal,is bureau unit.,GPON:Gigabit PON;EPON:Ethernet PONGE-PON:Gigabit Ethernet PON,PON Application,PON:Passive Optical NetworksAPON:ATM PON;BPON:Broadband PON;,Internal structure of transceivers,SFP,XFP,Types
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