Design And Implementation Of 10Gb/s XFP Optical Transceiver

In recent years,the communication system with high-speed and large-capacity is undergoing rapid development.The representative of this is the use of internet video services.In order to achieve such a large-capacity communications,there is a growing demand of ultra-high-speed optical transceiver module with 10G b/s transmission speed.On the development of 10G b/s optical transceiver module technology,it has emerged many products,such as Transponder,Xenpak,Xpak,X2,and XFP (10-Gigabit Small Form-Factor Pluggable Transceiver).Among those products,XFP is a kind of data-agnostic and multi-rate optical transceiver module,which can be used to handle telecommunications(STM-64,OTU-2 "G.709") and datacom application(10-Gigabit Ethernet,10-Gigabit Fiber Channel).Its application has nothing to do with the protocol,besides,low-cost,miniaturization and hot pluggable also make XFP the most promising technologies of the 10Gbps optical module. Therefore,the research and development of long-distance transmission of the XFP optical transceiver module has become the development trend of 10G optical modules. Under the strong impetus of optical module market,the transmission distance of XFP optical transceiver modules has gradually increased by 10km,40km and 80km from the initial 300m.This thesis first introduces the construction and principle of XFP optical transceiver module in detail.Also,the function and design of each part have been introduced clearly.Then,according to the key indicators of the high-speed and long distance optical transceiver module,the author proposes the overall design of the program,which includes hardware circuit design,MCU control procedures,the communication converter function,as well as the PC digital diagnostic software.In the hardware circuit design,electro-absorption modulated lasers and APD have been used as optical transceiver devices to reduce the chirped effect of high-speed modulated laser and improve the receiver sensitivity;To support the function of digital diagnosis,the author gets different monitoring information promptly through taking the single-chip microcomputer as control center,combining the working conditions and parameters of external chip configuration module,such as D/A converter block and EEPROM.etc.In software design,the author adopts incremental PID algorithm to do automatic control of laser working temperature and APD temperature compensation.In order to facilitate the PC and optical communication, the author also developed a set of communication conversion between RS-232 asynchronous serial interface and I~2C bus by himself.Finally,in order to verify the performance of modules,the testing program and testing environment for several important parameters of optical transceiver module are given by the author.Through testing,it shows that several important parameters of 10Gb/s 80km XFP optical transceiver module which is produced according to this program,such as,output optical power,extinction ratio,OMA,eye diagram and receiver sensitivity.etc.This well illustrates that the research has achieved the desired object.