超高精度时间频率同步及其应用

基金项目: 国家重点基础研究发展计划（批准号：2010CB922900）资助项目

High precision synchronization of time and frequency and its applications

(1 Joint Institute for Measurement Science,Department of Precision Instruments,Tsinghua University,Beijing 100084,China)
(2 Department of Physics,Tsinghua University,Beijing 100084,China)
(3 State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument,Tsinghua University,Beijing 100084,China)
(4 National Institute of Metrology,Beijing 100013,China)

摘要: 文章介绍了时间频率同步的主要概念及方法。重点介绍了在清华大学与中国计量科学研究院之间往返80 km的商用光纤链路上进行时间频率传输与同步的方案，实验得到7×10^-15/s, 5×10^-19/天的频率传输稳定度和50 fs的时间同步稳定度。针对不同网络结构，文章作者提出了多种光纤同步方案，并着重介绍了时间频率同步在科学研究领域中的一些重要应用。
- 时间频率 /
- 同步 /
- 卫星定位 /
- 光纤及网络结构
Abstract: We discuss the concept and methods for remote synchronization of time and frequency.We discuss a recent experiment that demonstrated time and frequency synchronization via a commercial fiber network, reaching accuracy of 7×10^－15/s, 5×10^－19/day, and a maximum time uncertainty of less than 50 femtoseconds. We discuss synchronization methods applicable to different topologies and their important scientific applications.
- time and frequency /
- synchronization /
- global navigation satellite system(GNSS) /
- fiber network

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