基于双纤单向传输的授时方法  

One-Way Time Transfer Method Based on Dual-Fiber Link

作　　者：魏恒 卢麟 蒲涛 郑吉林 赵继勇 张宝富 吴传信 Wei Heng;Lu Lin;Pu Tao;Zheng Jilin;Zhao Jiyong;Zhang Baofu;Wu Chuanxin(College of Communication Engineering,Army Engineering University of PLA,Nanjing,Jiangsu 210007,China;31103 Army,Nanjing,Jiangsu 210016,China)

机构地区：[1]陆军工程大学通信工程学院,江苏南京210007 [2]31103部队,江苏南京210016

出　　处：《中国激光》2020年第6期269-276,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(67373393,61974165)。

摘　　要：依据光纤折射率温变效应,得出了单向链路和往返双纤链路中单波长信号时延波动与双波长信号时延差波动的比值相等的理论模型,进而提出了与现有光纤通信网络兼容的双纤单向传输授时方法,仿真研究了双波长信号时延差波动和比值随波长和温度的变化规律。搭建了75 km双纤单向链路的延时测量平台,对比值相等模型进行了实验研究。实验结果表明:传输50 km后在终端站得到的比值为-266.9,时间信号经75 km双纤往返传输回本地站后得到的比值为-256.4,推算得出单向传输时延波动的理论与实际值相差520 ps。仿真和实验结果验证了基于双纤单向传输的授时方法的可行性。By considering the temperature-induced variation in the refractive index of optical fiber,a theoretical model of the proportion consistency between time delay variations and single-wavelength signal and time delay difference variations of dual-wavelength signals in one-way and round-trip dual-fiber links was obtained.Furthermore,a dual-fiber one-way time transfer method compatible with the existing optical communication network was proposed.The time delay difference variations of dual-wavelength and proportion with wavelength and temperature were investigated via simulation.The experiment for one-way time delay measurement using 75-km dual-fiber link was conducted to investigate the proportion consistency model.Results show that the measured proportion at the remote site after 50-km transmission is-266.9 and that after transmission back to the local site using 75-km round-trip dual-fiber link is-256.4.The difference between theoretical and practical values of the one-way time delay variation is 520 ps.The simulated and measured results validate the feasibility of the proposed one-way time transfer method based on a dual-fiber link.

关 键 词：光纤光学 授时 双纤单向链路 时延波动 时延差波动 比值相等 

分 类 号：TN929.1[电子电信—通信与信息系统]