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Chin. Phys. B, 2017, Vol. 26(8): 080601    DOI: 10.1088/1674-1056/26/8/080601
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Fiber-based joint time and frequency dissemination via star-shaped commercial telecommunication network

Yi-Bo Yuan(袁一博)1,2, Bo Wang(王波)1, Li-Jun Wang(王力军)1,2
1 State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
2 Department of Physics, Tsinghua University, Beijing 100084, China

A fiber-based, star-shaped joint time and frequency dissemination scheme is demonstrated. By working in cooperation with the existing commercial telecommunication network. Our scheme enables the frequency, time, and digital data networks to be integrated together and could represent an ideal option of interconnection among scientific institutions. The compensation functions of the time and frequency transfer scheme are set at the client nodes. The complexity of the central node is thus reduced, and future expansion by the addition of further branches will be accomplished more easily. During a performance test in which the ambient temperature fluctuation is 30 ℃/day, timing signal dissemination stability is achieved to be approximately ± 50 ps along 25-km-long fiber spools. After calibration, a timing signal synchronization accuracy of 100 ps is also realized. The proposed scheme offers an option of the construction of large-scale fiber-based frequency and time transfer networks.

Keywords:  time synchronization      telecommunication network      frequency transfer      star-shaped network     
Received:  02 March 2017      Published:  05 August 2017
PACS:  06.30.-k (Measurements common to several branches of physics and astronomy)  
  07.60.Vg (Fiber-optic instruments)  
  06.30.Ft (Time and frequency)  

Project supported by the National Key Scientific Instrument and Equipment Development Project, China (Grant No. 2013YQ09094303) and the Program of International Science and Technology Cooperation, China (Grant No. 2016YFE0100200).

Corresponding Authors:  Bo Wang     E-mail:
About author:  0.1088/1674-1056/26/8/

Cite this article: 

Yi-Bo Yuan(袁一博), Bo Wang(王波), Li-Jun Wang(王力军) Fiber-based joint time and frequency dissemination via star-shaped commercial telecommunication network 2017 Chin. Phys. B 26 080601

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