Hybrid Solution for Joint Transfer Time Signal With Both RF Frequency and Optical Frequency

IEEE Photonics Journal

Kang Ying¹  Yanguang Sun¹  Fei Yang¹  Haiwen Cai¹  Jianfeng Sun¹  Nan Cheng²  Jialiang Wang²  Fang Su²  Youzhen Gui² 

[1] Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China;Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

关键词: Joint transfer;    optical frequency;    fiber;    optical phase-lock-loop;   

DOI  :  10.1109/JPHOT.2021.3104924

来源: DOAJ

【 摘 要 】

We demonstrate a hybrid solution for simultaneous transfer of ultra-stable optical frequency, RF frequency and time signal on a 100 km fiber spool with the same wavelength based on coherent demodulation and optical phase-lock-loop (OPLL). The one pulse per second (1PPS) is encoded by phase and RF frequency is encoded with an intensity modulator. The noise caused by fiber link is compensated by the round-trip method. And the bad effect on optical frequency caused by optical phase modulation (PM) can be cleaned using OPLL. When the fiber link is stabilized, the transferred time deviation (TDEV) can be 2.4E-11@1s and 1.9E-12@10⁴s, RF frequency stability can achieve 8.0E-14@1s and 2.5E-17@10⁴s, the modified Allan deviation (MDEV) of cleaned optical frequency can be 1.4E-16@1s and 1.6E-19@10⁴s.

【 授权许可】

Unknown