Open AccessLong-term stable frequency transfer over an urban fiber link using microwave phase stabilization
Author(s) -
Dong Hou,
Peng Li,
Cheng Liu,
Jianye Zhao,
Zhigang Zhang
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.000506
Subject(s) - optics , fiber , dispersion shifted fiber , materials science , phase (matter) , optical fiber , compensation (psychology) , polarization maintaining optical fiber , microwave , graded index fiber , frequency comb , multi mode optical fiber , fiber optic sensor , physics , laser , psychology , quantum mechanics , psychoanalysis , composite material
We report a novel technique for highly stable transfer of a frequency comb over long optical fiber link. The technique implements an electronic compensation loop to cancel out the phase fluctuations that is introduced by the fiber. We utilized this technique to transfer a stable microwave frequency through a 20 km urban fiber link and an 80 km open air fiber link respectively. For the 20 km urban fiber link, the active compensation system reduced the phase fluctuation from 75 mrad (118 ps) to 4 mrad (6.3 ps) in 48 hours, and the frequency stability was improved by three orders of magnitude. For the 80 km open air fiber link, the active compensation system reduced the rms phase fluctuation from 580 mrad (914 ps) to 10 mrad (16 ps) in 24 hours, and the frequency stability was improved by two orders of magnitude.