Coherent phase transfer via fiber using heterodyne optical phase locking as optical amplification

被引：12
|
作者：
Deng, Xue [1 ,2 ,3 ]
Liu, Jie [1 ,3 ]
Zang, Qi [1 ,3 ]
Jiao, Dongdong [1 ,2 ,3 ]
Gao, Jing [1 ,3 ]
Zhang, Xiang [1 ,3 ]
Wang, Dan [1 ,3 ]
Dong, Ruifang [1 ,3 ]
Liu, Tao [1 ,3 ]
机构：
[1] Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[3] Chinese Acad Sci, Key Lab Time & Frequency Stand, Xian 710600, Shaanxi, Peoples R China
来源：
APPLIED OPTICS | 2018年 / 57卷 / 32期
基金：
中国科学院西部之光基金; 中国国家自然科学基金;
关键词：
FREQUENCY STANDARDS; LINK; NETWORK;
D O I：
10.1364/AO.57.009620
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a coherent phase transfer via a 224 km cascaded fiber link comprising two 112 km links stabilized by two phase-locking loops, respectively. The optical signal is regenerated employing heterodyne optical phase locking (HOPL) after the first 112 km transfer. With a gain of more than 50 dB, the HOPL is capable of tracking the frequency of the incoming carrier with a fluctuation of 0.48 mHz and preserving the instability of the incoming laser to 6 x 10(-20) at 1000 s. The phase noise cancellation of each span is investigated, and the out-loop transfer instability of the 224 km link reaches 7.7 x 10(-19) at 10,000 s. The relation between the transfer instability of each span and that of the whole link is also deduced in the paper, in agreement with experimental results of the 224 km link. (C) 2018 Optical Society of America
引用
收藏
页码：9620 / 9624
页数：5
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