100 km光纤链路中小于100 fs分辨力的双光梳钟差测量实验研究  

Experimental study on clock-offset measurement of sub 100 femtosecond resolution over 100 km fiber link with dual-comb system

作　　者：吴云峰 孟飞[2,3] 阿布都维力·阿布力克木[2] 宋晏蓉 张志刚[2] WU Yunfeng;MENG Fei;ABUDUWEILI Abulikemu;SONG Yanrong;ZHANG Zhigang(Institute of Information Photonics Technology,Faculty of Sciences,Beijing University of Technology,Beijing 100124,China;State Key Laboratory of Advanced Optical Communication Systems and Networks,School of Electronics,Peking University,Beijing 100871,China;Laboratory of Optical Frequency Standard,Time and Frequency Metrology Division,National Institute of Metrology,Beijing 100029,China)

机构地区：[1]北京工业大学理学部信息光电子研究所,北京100124 [2]北京大学电子学院区域光网络与新型光通信系统国家重点实验室,北京100871 [3]中国计量科学研究院时间频率计量研究所光学频率标准实验室,北京100029

出　　处：《计测技术》2023年第3期136-143,共8页Metrology & Measurement Technology

基　　金：国家自然科学基金(61761136002,61575004)。

摘　　要：为了解决远距离光纤链路两端测量钟差限制在ps量级的问题,运用线性光学采样法测量钟差的基本理论,利用双光梳线性光学采样法完成了100 km光纤链路两端的钟差测量实验研究。通过梳齿压缩和色散补偿技术实现了光梳梳齿线宽和远距离光纤链路净色散量的优化,突破了高精度读取干涉花样中心时刻的难点,最终实现了高分辨力的钟差测量。通过时间间隔计数器与线性光学采样法测量光纤链路时延对比实验和100 km光纤链路钟差测量实验证明:基于线性光学采样法测量的钟差小于100 fs,能够有效满足高精度时间同步系统的要求。本研究为促进精密导航、高速通信和精准授时等领域的发展起到重要作用。In order to solve the problem that the clock-offset measurement over a long fiber link is limited to picosecond level,we have completed the experimental study on clock-offset measurement over a 100 km fiber link based on dual-comb linear optical sampling method.The net dispersion of long-distance fiber link and the line width of comb teeth are optimized by using dispersion compensation and comb compression technology.The central time of interferograms can be accurately obtained,and the clock-offset is measured with higher resolution.The time delays over fiber link measured with time interval counter and dual-comb linear optical sampling method are compared,and the clock-offset over a 100 km fiber link is measured.The experimental results demonstrate that the clock-offset measured based on the linear optical sampling method is less than 100 fs.High resolution clock-offset measurement is the key technology of long distances time synchronization.High precision time synchronization technology has important applications in accurate navigation,high speed communication and timing system.

关 键 词：高分辨力钟差测量 双光梳 线性光学采样 

分 类 号：TB939[一般工业技术—计量学]