一种40Gb/s单信道光纤通信系统中的动态色度色散补偿  

Dynamic Dispersion Compensation in a 40 Gb/s Single-Channeled Optical Fiber Communication System

作　　者：李岩[1] 徐天华[1] 贾大功[1] 井文才[1] 胡浩[2] 于晋龙[2] 张以谟[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室,天津300072 [2]天津大学电信学院光纤通信实验室,天津300072

出　　处：《光学学报》2007年第7期1161-1165,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60577013);国家973计划(2003CB314907);新世纪优秀人才支持计划;天津大学青年教师基金资助课题

摘　　要：提出了一种用于40 Gb/s单信道光纤通信系统中的动态色度色散(CD)补偿技术。采用2×2光开关,色散补偿光纤(DCF)等器件构成可调节色度色散补偿器;提取中心频率为12GHz的窄带电功率信号作为反馈信号控制可调节色度色散补偿器,提取的窄带电功率值随系统中的累积色度色散值的增大而减小。实验证明,整个补偿系统的最长响应时间为0.7 s;补偿范围和补偿精度分别为81.55 ps/nm和5.28 ps/nm,通过增加光开关的数量和缩短每段色散补偿光纤的长度可以进一步提高补偿范围和精度。通过对比补偿前后系统的眼图可以看出:该系统能有效地补偿40 Gb/s光纤通信系统中动态变化的色度色散。A dynamic chromatic dispersion （CD） compensating technique for a 40 Gb/s single-channeled optical fiber communication system is demonstrated. The tunable dispersion compensator is composed of 2 × 2 optical switches, dispersion compensating fiber etc. For controlling the tunable dispersion compensator, a feedback signal is obtained by detecting the narrow band electrical power centered at 12 GHz, and the electrical power increases with the decrease of the accumulated chromatic dispersion. In experiment, the maximal response time of the system is 0.7 s. The compensating range and precision reach 81.55 ps/nm and 5.28 ps/nm respectively which can be further improved by adding the number of optical switches and reducing the length of dispersion compensating fiber. Experiments indicated that the dynamic dispersion compensating system can significantly improve the performance of 40 Gb/s optical communication systems according to the eye diagram before and after dispersion compensating.

关 键 词：光纤通信 动态色散补偿 色散补偿光纤 电功率检测 

分 类 号：U285.16[交通运输工程—交通信息工程及控制]