Acta Optica Sinica, Volume. 42, Issue 23, 2306006(2022)
Optical Frequency Transfer over 60 km Urban Telecom Fiber Link
This paper demonstrates the coherent optical frequency transfer over a 60 km fiber link between Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences and Huazhong University of Science and Technology. A 1560 nm ultra-stable laser is used as the transfer laser, and an acousto-optic modulator is employed to actively compensate for the phase noise introduced by optical fibers to achieve noise suppression of 67 dB at 1 Hz Fourier frequency. The end-to-end transfer of the all-fiber structure is adopted by the system, and tracking oscillators are used to suppress the amplitude fluctuation of the beating signals caused by fiber polarization change. In this way, the system can operate without interruption all day. The optical frequency offset introduced by the link is at the order of magnitude of
Get Citation
Copy Citation Text
Pengcheng Fang, Zhendi Cai, Huanyao Sun, Yan Wang, Yanqi Xu, Qunfeng Chen. Optical Frequency Transfer over 60 km Urban Telecom Fiber Link[J]. Acta Optica Sinica, 2022, 42(23): 2306006
Category: Fiber Optics and Optical Communications
Received: Mar. 18, 2022
Accepted: Jun. 15, 2022
Published Online: Dec. 14, 2022
The Author Email: Chen Qunfeng (qfchen@apm.ac.cn)