基于微波相位补偿的56 km高精度光纤微波频率传递  

High-resolution Microwave Frequency Dissemination via 56 km Optical Fiber Based on Microwave Phase Compensation

作　　者：全洪雷 赵文宇[1,2] 薛文祥 邢燕[1] 姜海峰[1,2] 郭文阁[1,3] 张首刚 QUAN Honglei;ZHAO Wenyu;XUE Wenxiang;XING Yan;JIANG Haifeng;GUO Wenge;ZHANG Shougang(National Time Service Center,Chinese Academy of Sciences,Key Laboratory of Time and Frequency Standards of CAS,Xi'an 710600,China;University of Chinese Academic of Sciences,Beijing 100049,China;School of Science,Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]中国科学院国家授时中心中国科学院时间频率基准重点实验室,西安710600 [2]中国科学院大学,北京100049 [3]西安石油大学理学院,西安710065

出　　处：《光子学报》2021年第4期32-38,共7页Acta Photonica Sinica

基　　金：国家杰出青年科学基金(No.61825505)。

摘　　要：报道了实验室内56 km光纤微波频率传递的实验研究,在56 km的传递距离上实现了1.8×10^(-15)/s,4×10^(-18)/10^(4)s的传递稳定度。系统通过环回法比较往返传递的微波信号相位获得链路上的相位扰动量,并实时控制本地发射端的微波发射信号相位实现预补偿。在环回往返传递的不同方向上,系统方案采用不同频率的微波调制信号,这种方法极大避免了光寄生反射效应的影响,同时利用色散补偿光纤改善探测信号相噪等措施,提高了系统的传递稳定度。This paper reports a microwave frequency dissemination experiment over a 56 km-long-fiber link in the laboratory,exhibiting frequency instabilities of 1.8×10^(-15)/s and 4×10^(-18)/10^(4) s.The phase perturbation accumulated along the fiber link is detected by comparing the round-trip signal with the reference signal.By controlling the phase of the transmitted signal in real time,the phase perturbation along the fiber link is compensated.Different modulation frequencies are used to avoid stray reflection effect.To improve the phase noise of the detection signal,we also implemented dispersion compensation.

关 键 词：光纤 微波频率 频率传递 相位扰动 锁相技术 

分 类 号：TN929.11[电子电信—通信与信息系统]