Fiber Based Time and Frequency Synchronization System

  • GAO Chao ,
  • WANG Bo ,
  • BAI Yu ,
  • MIAO Jing ,
  • ZHU Xi ,
  • LI Tianchu ,
  • WANG Lijun
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  • 1. Joint Institute for Measurement Science, Tsinghua University, Beijing 100084, China;
    2. State Key Laboratory of Precision Measurement Technology and Instrument; Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China;
    3. Department of Physics, Tsinghua University, Beijing 100084, China;
    4. National Institute of Metrology, Beijing 100013, China

Received date: 2014-09-25

  Revised date: 2014-10-30

  Online published: 2014-12-17

Abstract

The continuous, precise time and frequency synchronization system was built on an 80 km single urban fiber link, between Tsinghua University and the National Institute of Metrology. Through precise time and frequency synchronization, the frequency dissemination stability of 7×10-15/s and 5×10-19/d was obtained; with active transfer delaycompensation at the transmitting site, the time synchronization inaccuracy was < 50 ps. For the current fiber based frequency dissemination schemes, the disseminated frequencysignal can only be recovered at specific location. A multiple-access RF dissemination scheme was proposed and demonstrated. Using this method, the stable disseminatedfrequency signal can be recovered at an arbitrary node along theentire fiber pathway, which provides a solution for the time-frequency synchronization network in the future.

Cite this article

GAO Chao , WANG Bo , BAI Yu , MIAO Jing , ZHU Xi , LI Tianchu , WANG Lijun . Fiber Based Time and Frequency Synchronization System[J]. Science & Technology Review, 2014 , 32(34) : 41 -46 . DOI: 10.3981/j.issn.1000-7857.2014.34.005

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