High-precision two-way time transfer system via long-distance commercial fiber link

CI Cheng; ZHAO Ying-xin; WU Hong; LIU Bo; ZHANG Xue-song; ZHANG Yu

doi:doi:10.1007/s11801-017-7195-2

光电子快报（英文版）, 2017, 13 (6): 427, Published Online: Sep. 13, 2018

High-precision two-way time transfer system via long-distance commercial fiber link

论文大纲

CI Cheng ^1,2ZHAO Ying-xin ^1,2,*WU Hong ^1,2LIU Bo ^1,2,3ZHANG Xue-song ^1,2ZHANG Yu ^1,2

Author Affiliations

¹ Institute of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China

² Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300071, China

³ Key Laboratory of Optical Information Science and Technology, Ministry of Education, Nankai University, Tianjin 300071, China

Abstract

Time synchronization techniques, especially on the pulse per second (PPS) temporal basis, have attracted growing research interests in recent years. In this paper, we have proposed and experimentally demonstrated a high-precision two-way time transfer (TWTT) system to realize long-distance dissemination of 1 PPS signal generated by a hydrogen maser. A dense-wavelength-division-multiplexing (DWDM) system and bi-directional erbium-doped fiber amplifiers (Bi-EDFAs) have also been adopted to suppress the impact of Rayleigh backscattering and optimize the signal to noise ratio (SNR) as well. We have theoretically analyzed the systematic delay in detail. The ultimate root mean square (RMS) variation of time synchronization accuracy is sub-26 ps and the time deviation can be reduced to as low as 1.2 ps at 100 s and 0.253 ps at 12 000 s, respectively.

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CI Cheng, ZHAO Ying-xin, WU Hong, LIU Bo, ZHANG Xue-song, ZHANG Yu. High-precision two-way time transfer system via long-distance commercial fiber link[J]. 光电子快报（英文版）, 2017, 13(6): 427.

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