Optical-Frequency Transfer over a Single-Span 1840 km Fiber Link
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- 12 September 2013
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 111 (11), 110801
- https://doi.org/10.1103/physrevlett.111.110801
Abstract
To compare the increasing number of optical frequency standards, highly stable optical signals have to be transferred over continental distances. We demonstrate optical-frequency transfer over a 1840-km underground optical fiber link using a single-span stabilization. The low inherent noise introduced by the fiber allows us to reach short term instabilities expressed as the modified Allan deviation of 2 X 10(-15) for a gate time tau of 1 s reaching 4 X 10(-19) in just 100 s. We find no systematic offset between the sent and transferred frequencies within the statistical uncertainty of about 3 X 10(-19). The spectral noise distribution of our fiber link at low Fourier frequencies leads to a tau(-2) slope in the modified Allan deviation, which is also derived theoretically.This publication has 31 references indexed in Scilit:
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