光纤时间传递的时延测量技术  

Time-Delay Measurement Techniques for Time Transfer over Optical Fibers

作　　者：周旭[1,2,3] 陈法喜 赵侃[1,2] 刘涛[1,2] 张首刚[1,2] Zhou Xu;Chen Faxi;Zhao Kan;Liu Tao;Zhang Shougang(National Time Service Center,Chinese Academy of Sciences,Xi＇an,Shaanxi 710600,China;Key Laboratory of Time and Frequency Standards,National Time Service Center,Chinese Academy of Sciences Xi＇an,Shaanxi 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,陕西西安710600 [2]中国科学院国家授时中心时间频率基准重点实验室,陕西西安710600 [3]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2018年第8期292-297,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金重大项目(91636101);国家自然科学基金(11273024);国家重点研发计划(2016YFF0200200)

摘　　要：为了满足长距离光纤时间传递的工程要求,提出了一种基于时间数字转换(TDC)和现场可编程门阵列(FPGA)的时延测量方法。该方法将FPGA测量范围大和TDC分辨率高的特点相结合,实现了大范围高分辨率的光纤时延测量。研究结果表明,该系统的测量范围为0~1s,分辨率为22ps,不确定度优于100ps。In order to meet the engineering requirements of long haul time transfer over optical fibers,a time-delay measurement method based on the time digital conversion（TDC）and the field programmable gate array（FPGA）is proposed.This method combines the characteristics of a large measurement range for FPGA and a high resolution for TDC,and thus an optical fiber time-delay measurement with a high resolution in a wide range is realized.The research results show that the measurement range of this system is 0-1 s,the resolution is 22 ps,and the uncertainty degree is superior to 100 ps.

关 键 词：测量 光纤链路 光纤时间传递 时延测量 

分 类 号：TN929.11[电子电信—通信与信息系统]