PMD恶化信号的同步调制再生  

Regeneration of PMD impaired signals using synchronous modulation

作　　者：姚和军[1] 娄采云[1] 霍力[1] 高以智[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2004年第4期519-521,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(60177019);国家"八六三"高技术项目(2001AA122042)

摘　　要：偏振模色散(PMD)是高速光通信的主要技术限制。为了处理PMD造成的光信号恶化,该文采用了同步调制再生的方法,从理论上分析了同步调制再生的PMD容限,证明在装置参数不变的情况下,可再生群时延差(DGD)值在0～35ps之间变化的PMD恶化信号;通过调整参数,可再生DGD值高达50ps的PMD恶化信号。在实验上用同步调制的方法实现了DGD值在0～35psPMD恶化10Gb/s归零码信号的再生。结果表明该方法勿需准确测量PMD值,响应速度与光信号传输速度相同,没有滞后现象,能应用于较大范围内PMD恶化信号的自动恢复。Polarization mode dispersion (PMD) has emerged as a major limitation in high speed optical communication systems. A synchronous modulation regeneration method was developed to process PMD impaired signals. The PMD limitation of synchronous modulation regeneration was analyzed theoretically to demonstrate that PMD impaired signals with differential group delay (DGD) changes between 0 to 35 ps can be regenerated without adjusting the synchronous modulation equipment parameters. PMD impaired signals with DGD changes up to 50 ps can be regenerated by adjusting the synchronous modulation equipment parameters. In tests, the synchronous modulation method was able to regenerate DGD 0~35 ps PMD impaired 10 Gb/s signals return to zero code signals. With this method, the PMD value need not be measured precisely, so the response time is short and the method can be used for mitigation of a wide range of PMD impaired signals.

关 键 词：光纤通信 偏振模色散 同步调制再生 归零码 PMD 传输速度 

分 类 号：TN929.11[电子电信—通信与信息系统]