1. Hybrid Solution for Joint Transfer Time Signal With Both RF Frequency and Optical Frequency
- Author
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Youzhen Gui, Jialiang Wang, Nan Cheng, Fei Yang, Fang Su, Haiwen Cai, Yanguang Sun, Jianfeng Sun, and Kang Ying
- Subjects
Materials science ,Optical fiber ,business.industry ,Joint transfer ,optical phase-lock-loop ,optical frequency ,QC350-467 ,Optics. Light ,Noise (electronics) ,Atomic and Molecular Physics, and Optics ,TA1501-1820 ,law.invention ,Optics ,law ,Time deviation ,Demodulation ,Applied optics. Photonics ,Radio frequency ,Electrical and Electronic Engineering ,Allan variance ,business ,Frequency modulation ,Phase modulation ,fiber - Abstract
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.
- Published
- 2021