多址光纤微波频率传递技术研究  

Multi-Access Fiber Microwave Frequency Transmission Technology

作　　者：鱼少少 全洪雷 赵文宇[1,2] 薛文祥 王鑫 张首刚[1,2] Yu Shaoshao;Quan Honglei;Zhao Wenyu;Xue Wenxiang;Wang Xin;Zhang Shougang(Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi an 710600,Shaanxi,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Communications and Information Engineering,Xi an University of Posts and Telecommunications,Xi an 710121,Shaanxi,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,陕西西安710600 [2]中国科学院大学,北京100049 [3]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《光学学报》2024年第5期36-41,共6页Acta Optica Sinica

基　　金：中国科学院西部之光基金(29202082)。

摘　　要：本文提出一种多址光纤微波频率传递技术,可以实现一个主端到多个从端的系统构架,并且支持信号中途下载功能,增强了光纤微波频率传递技术的应用范围。本文系统方案主从端采用不同的激光波长,消除了信号光寄生反射和背向散射的影响。经实验验证,多址光纤微波传递系统稳定度分别达到3.5×10^(-14)/s和1.2×10^(-17)/105s;中途下载端的稳定度分别为4.1×10^(-14)/s和6.5×10^(-17)/105s。多址光纤微波频率传递系统所实现的指标能够满足目前各种应用对微波原子频标的远距离传输需求,具有广阔的应用前景。Objective The fiber optic microwave frequency transmission technology is based on the loopback method to detect and suppress fiber optic noise.Under the adoption of existing communication fiber links,the frequency transmission stability can reach 10^(-18)/d-10^(19)/d,which meets the remote transmission and comparison of current microwave atomic reference frequency standards,with broad application prospects.At present,most of the solutions are point-to-point master-slave station transmission structures,and in many application scenarios,it is necessary to deliver a reference frequency source to multiple users(multiple access),and even add a midway download point in the transmission fiber link,such as square kilometer array(SKA),radio telescope array,and very-long-baseline interferometry(VLBI).The high-precision groundbased time service project undertaken by the National Time Service Center,Chinese Academy of Sciences includes the construction of a thousand-kilometer level fiber optic microwave frequency transmission network,which employs the unique electrical phase compensation transmission scheme of the center.As a supplement to the backbone transmission network,the local frequency distribution network needed for the future is constructed,and a set of multi-access transmission and mid-download equipment schemes compatible with the existing system is designed to enhance the regional service capability of the high-precision ground-based timing system.As a result,the standard frequency signal in the backbone network can reach the client within 100 km of the urban node to complete the local frequency signal distribution task of the city node.Methods The system diagram of multi-access fiber microwave frequency transmission technology is shown in Fig.1,where TX is the common transmitting end and RX1?RXN are multiple receiving ends,or there are multiple addresses.At the transmitter TX,the reference signal is modulated onto the laser carrier by a Mach-Zehnder modulator(MZM)and an external modulation.Then,by adopting a fib

关 键 词：光纤微波 频率传递 微波频率 锁相技术 

分 类 号：TN919.11[电子电信—通信与信息系统]