A high-precision bidirectional time-transfer system over a single fiber based on wavelength-division multiplexing and time-division multiplexing

被引:1
作者
Guo, Xinxing [1 ,2 ]
Liu, Bo [1 ,2 ]
Kong, Weicheng [1 ,2 ]
Quan, Honglei [1 ,2 ]
Zhang, Yucan [1 ,2 ]
Liu, Tao [1 ]
Dong, Ruifang [1 ]
Zhang, Shougang [1 ]
机构
[1] Chinese Acad Sci, Natl Time Serv Ctr, Xian, Peoples R China
[2] Univ Chinese Acad Sci, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
high-precision; time transfer; SFWDM-TDM; self-recovery; bidirectional; FREQUENCY;
D O I
10.3389/fphy.2022.1080966
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this paper, a high-precision bidirectional time-transfer system over a single fiber based on wavelength-division multiplexing and time-division multiplexing (SFWDM-TDM) is proposed, which combines the advantages of wavelength-division multiplexing and time-division multiplexing. It uses two dense wavelength-division channels to effectively suppress the problem of optical fiber reflection. At the same time, the time-division multiplexing method is used in combination with sampling and holding the time to complete the multi-user task. In hardware, we optimized the carrier processing and the high-precision time-delay control module of the SFWDM-TDM system to complete high-precision time-transfer equipment. In software and algorithm, the optical fiber time-interval measurement method and measurement times are optimized, and the SFWDM-TDM system reaches a synchronization accuracy of 8.9 ps at 1 s. Finally, a real-time detection mechanism with self-recovery ability is added to the system. This lays the foundation for a reliable, long-distance, high-precision, and multi-user mode optical fiber time- and frequency-transfer network.
引用
收藏
页数:8
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