Phase-stabilized free-space link for optical frequency transfer

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Optical frequency transfer through the atmosphere is needed for diverse free-space applications, e.g. coherent communication, optical clock comparison and relativity experiments. The task requires an appropriate optical link system that provides the multimodal abilities of not only pointing, acquisition, and tracking (PAT) but also phase noise suppression in the presence of air turbulence. Here, we describe a free-space optical (FSO) link system built over a 1.4 km outdoor path to transmit optical frequencies with a fast beam tracking capability together with an active feedback compensation scheme of the atmospheric phase noise. The FSO link is able to offer a frequency transfer stability of 3.51 x 10(-19) at 100 s averaging, which suffices to deliver the current state-of-the-art optical clock signals.
Publisher
ELSEVIER
Issue Date
2022-02
Language
English
Article Type
Article
Citation

OPTICS COMMUNICATIONS, v.504

ISSN
0030-4018
DOI
10.1016/j.optcom.2021.127481
URI
http://hdl.handle.net/10203/288948
Appears in Collection
ME-Journal Papers(저널논문)
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