基于双波长传输的600 km光纤授时实验  

600 km optical fiber time transfer experiment based on dual wavelength transmission

作　　者：钟震林 李恩[1] 丁明吉[1] 蒋攀 ZHONG Zhenlin;LI En;DING Mingji;JIANG Pan(The 34th Research Institute of CETC,Guilin Guangxi 541004,China)

机构地区：[1]中国电子科技集团公司第三十四研究所,广西桂林541004

出　　处：《光通信技术》2021年第6期31-35,共5页Optical Communication Technology

基　　金：广东省重点领域研发计划项目(2019B010119001)资助。

摘　　要：针对长距离高精度光纤时间同步需求,利用双向掺铒光纤放大器(EDFA)进行传输距离扩展。介绍了光纤授时系统组成,通过构建光纤授时链路时延模型,重点对长距离光纤授时系统中的不对称时延问题进行了研究分析,并详述了精确校准方法,最后搭建实验平台对授时性能进行了测试验证。测试结果表明:时间同步准确度达-47 ps,同步精度达128 ps,实现了600 km亚纳秒级光纤时间传递。According to the requirements of time synchronization in long haul optical fiber links,the bidirectional Erbium doped fiber amplifiers(EDFA)are used to extend the transmission distance.This paper introduces the composition of the optical fiber time transfer system.By constructing the time delay model of the optical fiber time transfer link,it focuses on the research and analysis of the asymmetric time delay in the long-distance optical fiber time transfer system,and details the accurate calibration method.Finally,an experimental platform is built to test and verify the time transfer performance.The test results show that the time synchronization accuracy is-47 ps,and the synchronization accuracy is 128 ps,the 600 km sub nanosecond optical fiber time transmission is realized.

关 键 词：时间同步 亚纳秒 双向掺铒光纤放大器 不对称性校准 

分 类 号：TN929.11[电子电信—通信与信息系统]