High-precision multi-node clock network distribution

Xing Chen; Yifan Cui; Xing Lu; Cheng Ci; Xuesong Zhang; Bo Liu; Hong Wu; Tingsong Tang; Kebin Shi; Zhigang Zhang

doi:10.1063/1.5006521

High-precision multi-node clock network distribution

Rev Sci Instrum. 2017 Oct;88(10):103103. doi: 10.1063/1.5006521.

Authors

Xing Chen¹, Yifan Cui¹, Xing Lu², Cheng Ci³, Xuesong Zhang³, Bo Liu³, Hong Wu³, Tingsong Tang⁴, Kebin Shi², Zhigang Zhang¹

Affiliations

¹ State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China.
² State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China.
³ School of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China.
⁴ Beijing Satellite Navigation Center, Beijing 100094, China.

PMID: 29092494
DOI: 10.1063/1.5006521

Abstract

A high precision multi-node clock network for multiple users was built following the precise frequency transmission and time synchronization of 120 km fiber. The network topology adopts a simple star-shaped network structure. The clock signal of a hydrogen maser (synchronized with UTC) was recovered from a 120 km telecommunication fiber link and then was distributed to 4 sub-stations. The fractional frequency instability of all substations is in the level of 10^-15 in a second and the clock offset instability is in sub-ps in root-mean-square average.