用电功率反馈控制信号实现10Gbit/s系统的PMD补偿实验(英文)  

Experiments of PMD Compensation Using Electrical Feedback Signals for a 10Gbit/s System

作　　者：王剑[1,2] 于晋龙[1] 胡浩[1] 袁国慧[1] 杨恩泽[1] 

机构地区：[1]天津大学精仪学院,光电信息技术科学教育部重点实验室,天津300072 [2]中国民航学院通信工程系

出　　处：《光子学报》2005年第2期248-251,共4页Acta Photonica Sinica

基　　金：SupportedbyTianjinNaturalScience(No. 023800711 ); 863 plan(2001AA312220)andTianjinUniv.Foundationforyouth

摘　　要：光纤通信线路检测到的电功率随差分群延迟变化,可以作为PMD补偿的反馈控制信号.给出了这一变化关系的理论计算和曲线并通过实验验证这一关系,确定电压信号与DGD的变化关系.建立了一套完整的实验系统,并考虑了影响反馈电压信号的多种因素以及减小这些影响的措施.眼图给出的实验结果说明了补偿的效果,还利用误码测试仪测量了补偿前后的接收灵敏度的改变以定量说明补偿的效果,最后比较了不同情况下的补偿结果.Electrical power, changing with differential group delay (DGD) and detected from an optical communication link, can be used as feedback signals of compensating for PMD. Theoretical calculations and curves are given representing the change of electrical power with DGD. Experimental results confirming the theoretical calculations are presented for voltage V changing with DGD. A setup is built for experiments of PMD compensations. Several factors affecting the feedback signals are proposed and methods are given to make the fluctuations less. Results of PMD compensation prototype for a 10 Gb/s pseudo random sequence are shown through eye patterns. These results are also shown by receiver sensitivity improvements after compensation. Receiver sensitivity under 3 different bit error rates are measured using BER measuring equipment. Comparisons of results using different fibers are made, confirming the effectiveness of compensation.

关 键 词：光纤通信 偏振模色散 偏振控制 差分群延迟 反馈控制信号 

分 类 号：TN929.11[电子电信—通信与信息系统]