Experimental simulation of time and frequency transfer via an optical satellite–ground link at 10-18 instability

Posted on 05.04.2021 - 19:14
Time and frequency transfer lies at the heart of the field of metrology. Compared to current microwave dissemination such as GPS, optical domain dissemination can provide more than one order of magnitude in terms of higher accuracy. Although optical frequency transfer has been demonstrated over thousand kilometers fiber lines, intercontinental time comparison and synchronization will be more convenient with satellite free space optical time and frequency transfer. By analyzing parameters of satellite in different orbits, we believe that high orbit links have advantages of long duration, large common view range and lower relativistic effects, enabling more stable optical clock and time-frequency comparison or dissemination. Then, we perform a 16-km free space transfer experiment to simulate the link in loss, noise and delay effect. The link exhibits an instability of 4×10¯¹⁸ level at 3,000 seconds and around 10-fs time deviation with an average loss of 72 dB, which is comparable with the loss of a satellite-ground link at geostationary earth orbit (GEO).

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Shen, Qi; Guan, Jian-Yu; zeng, ting; Lu, Qi-Ming; Huang, Liang; Cao, Yuan; et al. (2021): Experimental simulation of time and frequency transfer via an optical satellite–ground link at 10-18 instability. The Optical Society. Collection. https://doi.org/10.6084/m9.figshare.c.5238422.v2
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AUTHORS (10)

Qi Shen
Jian-Yu Guan
ting zeng
Qi-Ming Lu
Liang Huang
Yuan Cao
Jiu-Peng Chen
Tian-Qi Tao
Jincai Wu
lei hou

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