Stable Radio Frequency Transfer Over Free Space by Passive Phase Correction

The frequency transmission over free-space link can effectively overcome the dependence of existing optical fiber time-frequency transmission technology on optical fiber network. In this paper, we demonstrate a passive phase correction technique over a 124 m long indoor atmospheric radio frequency (...

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Bibliographic Details
Published in:IEEE photonics journal 2019-12, Vol.11 (6), p.1-8
Main Authors: Chen, Yaqing, Cai, Haiwen, Jiang, Mingyu, Cheng, Nan, Wu, Rui, Wang, Jialiang, Sun, Yanguang, Yang, Fei, Pang, Fufei, Gui, Youzhen
Format: Article
Language:English
Subjects:
Backscattering
Dependence
Fluctuations
fractional frequency instability
Free-space link
Frequency stability
Laser beams
Laser stability
Optical fibers
passive phase correction
Radio frequency
RF frequency transfer
RF signals
Time-frequency analysis
Variations
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Summary:The frequency transmission over free-space link can effectively overcome the dependence of existing optical fiber time-frequency transmission technology on optical fiber network. In this paper, we demonstrate a passive phase correction technique over a 124 m long indoor atmospheric radio frequency (RF) dissemination. This scheme simplifies the system, and suppresses the effects of Rayleigh backscattering. We verify the feasibility of the scheme by transmitting 1 GHz RF signals over the atmospheric link. After timing fluctuation compensation, the relative frequency stability can reach 6.8 × 10 -15 for 1 s and 3.2 × 10 -17 for 10 3 s, the RMS timing fluctuation is 186 fs in 5000 s. It can be proved that the scheme is very effective in eliminating phase noise caused by atmospheric link.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2019.2945753