超高精度时间频率同步及其应用

High precision synchronization of time and frequency and its applications

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。

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.