中国物理B ›› 2017, Vol. 26 ›› Issue (8): 80601-080601.doi: 10.1088/1674-1056/26/8/080601

• GENERAL • 上一篇    下一篇

Fiber-based joint time and frequency dissemination via star-shaped commercial telecommunication network

Yi-Bo Yuan(袁一博), Bo Wang(王波), Li-Jun Wang(王力军)   

  1. 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
  • 收稿日期:2017-03-02 修回日期:2017-03-30 出版日期:2017-08-05 发布日期:2017-08-05
  • 通讯作者: Bo Wang E-mail:bo.wang@tsinghua.edu.cn
  • 基金资助:

    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).

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. 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
  • Received:2017-03-02 Revised:2017-03-30 Online:2017-08-05 Published:2017-08-05
  • Contact: Bo Wang E-mail:bo.wang@tsinghua.edu.cn
  • About author:0.1088/1674-1056/26/8/
  • Supported by:

    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).

摘要:

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.

关键词: time synchronization, telecommunication network, frequency transfer, star-shaped network

Abstract:

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.

Key words: time synchronization, telecommunication network, frequency transfer, star-shaped network

中图分类号:  (Measurements common to several branches of physics and astronomy)

  • 06.30.-k
07.60.Vg (Fiber-optic instruments) 06.30.Ft (Time and frequency)