Frequency comb-based microwave transfer over fiber with 7x10(-19) instability using fiber-loop optical-microwave phase detectors

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We demonstrate a remote microwave/radio frequency (RF) transfer technique based on the stabilization of a fiber link using a fiber-loop optical-microwave phase detector (FLOM-PD). This method compensates for the excess phase fluctuations introduced in fiber transfer by direct phase comparison between the optical pulse train reflected from the remote site and the local microwave/RF signal using the FLOM-PD. This enables sub-fs resolution and long-term stable link stabilization while having a wide timing detection range and less of a demand in fiber dispersion compensation. The demonstrated fractional frequency instability between 2.856 GHz RF oscillators separated by a 2.3 km fiber link is 7.6 x 10(-18) and 6.5 x 10(-19) at 1000 and 82,500 s averaging times, respectively. (C) 2014 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2014-03
Language
English
Article Type
Article
Keywords

RADIO-FREQUENCY; FREE-SPACE; SYNCHRONIZATION; TRANSMISSION; LINK

Citation

OPTICS LETTERS, v.39, no.6, pp.1577 - 1580

ISSN
0146-9592
DOI
10.1364/OL.39.001577
URI
http://hdl.handle.net/10203/187230
Appears in Collection
ME-Journal Papers(저널논문)
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