Coherent Transfer of Optical Frequency over 112 km with Instability at the 10^(-20) Level

作     者：邓雪 刘杰 焦东东 高静 臧琦 许冠军 董瑞芳 刘涛 张首刚 

作者机构：National Time Service CentreChinese Academy of Sciences Key Laboratory of Time and Frequency StandardsChinese Academy of Sciences University of Chinese Academy of Sciences 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2016年第33卷第11期

页      面：47-49页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：Supported by the Special Fund for Major Scientific Equipment and Instrument Development of the National Natural Science Foundation of China under Grant No 61127901 the National Natural Science Foundation of China under Grant Nos 10225417,11273024,61025023 and 91636101 the Young Scientists Fund of the National Natural Science Foundation of China under Grant No 11403031 the Key Deployment Project of the Chinese Academy of Sciences under Grant No KJZD-EW-W02 the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant No XDB21030800 the National Key Research and Development Program of China under Grant Nos 2016YFF0200200 and 2016YFF0200205 

主　　题：of is as link Coherent Transfer of Optical Frequency over 112 km with Instability at the 10 Level with over 

摘      要：We demonstrate optical-carrier transfer over a 112-km single-span urban fiber link, By actively compensating the phase noise induced along the fiber link, a noise suppression of 55 dB at 1 Hz is obtained. A fractional frequency instability of 2.5× 10^-16 at i s is achieved, and reaching 7.5× 10^-20 at 10000 s. The system is stable and able to run for a long time. This work will contribute to optical frequency distribution and remote comparison among atomic clocks.