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

High-precision multi-node clock network distribution.

Author information

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.

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.

PMID:
29092494
DOI:
10.1063/1.5006521

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