Newbury, N.
, Williams, P.
and Swann, W.
(2007),
Coherent transfer of an optical carrier over 251 km, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32716
(Accessed May 23, 2025)
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Coherent transfer of an optical carrier over 251 km
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Author(s)
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Abstract
We transfer of an optical frequency over 251 km of optical fiber with a residual instability of 6×10-19 at 100 s. This instability and the associated timing jitter are limited fundamentally by the noise on the optical fiber and link length. We give a simple expression for calculating the achievable instability and jitter over a fiber link. Transfer of optical stability over this long distance requires a highly coherent optical source, provided here by a cw fiber laser locked to a high finesse optical cavity. A sufficient optical carrier signal is delivered to the remote fiber end by incorporating two-way, in-line erbium doped fiber amplifiers to balance the 62 dB link loss.Citation
Optics Letters
Volume
32
Issue
21
Pub Type
Journals
Download Paper
Keywords
coherent communications, frequency transfer
Citation
Issues
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Created October 15, 2007, Updated February 17, 2017