消光比对10Gb/s光接收模块灵敏度的影响  

The influence of extinction ratio to optical sensitivity of 10Gb/s optical receiver modules

作　　者：丁国庆 龙兰芬 刘王来 胡长飞 

机构地区：[1]武汉华工正源光子技术有限公司

出　　处：《光通信技术》2011年第12期18-20,共3页Optical Communication Technology

摘　　要：10Gb／s光通信用光接收模块前端常采用APD-TIA组件。理论表明，具有该组件的10Gb／s光接收模块的光灵敏度，主要取决于光纤耦合效率、APD偏置电压、光倍增、过剩噪声和暗电流和消光比等。测试表明，当其它相关因素不变，消光比由5．0dB变到11．0dB时，光接收灵敏度发生2．0-5．0dBm的优化，指出了获得较佳光接收灵敏度的消光比范围以及频率啁啾的影响。APD--TIA subassembly have been often used in front-end of 10Gb/s high sensitive receivers. Theoretical analysis shows that the light receiving sensitivity of 10Gb/s optical receiver depend mainly on the fiber Coupling efficiency, the bias voltage,optical multiplication, granular noise and dark current of APD,and extinction ratio etc. They indicate that the optical receiving sensitivity changes 2.0-5.0dBm when extinction ratio varies firom 5.0dB tol 1.0dB under no changing other related factors for the 10Gb/s optical receiver modules, and Pointed out the optimum extinction ratio range and frequency chirp influence in order to obtain the batter optical receiver sensitivity for 10Gb/s optical receiver modules.

关 键 词：APD-TIA 光接收灵敏度 消光比 光功率代价 

分 类 号：TN929.11[电子电信—通信与信息系统]