光电子快报(英文版), 2018, 14 (2): 109, Published Online: Sep. 17, 2018
Digital output compensation for precise frequency transfer over commercial fiber link
Abstract
An ultra-highly precise and long-term stable frequency transmission system over 120 km commercial fiber link has been proposed and experimentally demonstrated. This system is based on digital output compensation technique to suppress phase fluctuations during the frequency transmission process. A mode-locked erbium-doped fiber laser driven by a hydrogen maser serves as an optical transmitter. Moreover, a dense wavelength division multiplexing system is able to separate forward and backward signals with reflection effect excluded. The ultimate fractional frequency insta-bilities for the long-distance frequency distributed system are up to 3.14×10-15 at 1 s and 2.96×10-19 at 10 000 s, re-spectively.
CI Cheng, WU Hong, TANG Ran, LIU Bo, CHEN Xing, ZHANG Xue-song, ZHANG Yu, ZHAO Ying-xin. Digital output compensation for precise frequency transfer over commercial fiber link[J]. 光电子快报(英文版), 2018, 14(2): 109.