Time Transfer in a 1839-km Telecommunication Fiber Link Demonstrating a Picosecond-Scale Stability  

作　　者：郭新兴 侯丙安 刘博 杨凡 孔维成 刘涛 董瑞芳 张首刚 Xinxing Guo;Bing'an Hou;Bo Liu;Fan Yang;Weicheng Kong;Tao Liu;Ruifang Dong;Shougang Zhang(Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Sichuan Taifu Ground Beidou Technology Co.,Ltd,Chengdu 610093,China;Hefei National Laboratory,Hefei 230088,China)

机构地区：[1]Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [3]Sichuan Taifu Ground Beidou Technology Co.,Ltd,Chengdu 610093,China [4]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Physics Letters》2024年第6期49-53,共5页中国物理快报（英文版）

基　　金：supported by the National Major Science and Technology Infrastructure Project of China,for“High Precision Ground-based Time Service System”(Grant No.2017-000052-73-01-002401);the National Natural Science Foundation of China(Grant No.12033007)。

摘　　要：An implementation of high-precision time transfer over a 1839-km field fiber loop back link between two provincial capitals of China,Xi’an and Taiyuan,is reported.Time transfer stabilities of 6.5 ps at averaging time of 1 s and 4.6 ps at 40000 s were achieved.The uncertainty for the time transfer system was evaluated,showing a budget of 56.2 ps.These results stand for a significant milestone in achieving high-precision time transfer over a field fiber link spanning thousands of kilometers,signifying a record-breaking achievement for the real-field time transfer in both stability and distance,which paves the way for constructing the nationwide high-precision time service via fiber network.

关 键 词：FIBER NATIONWIDE LINK 

分 类 号：TN929.11[电子电信—通信与信息系统]