Open AccessThermal phase noise in giant interferometric fiber optic gyroscopes
Author(s) -
Yulin Li,
Yuwen Cao,
Dong He,
Yangjun Wu,
Fangyuan Chen,
Chao Peng,
Zhengbin Li
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.014121
Subject(s) - optics , phase noise , interferometry , noise (video) , physics , gyroscope , fibre optic gyroscope , optical fiber , fiber optic sensor , phase modulation , computer science , quantum mechanics , artificial intelligence , image (mathematics)
The thermal phase noise in giant interferometric fiber optic gyroscopes (fiber length L > 10 km) and its impact on the detection sensitivity are theoretically derived and experimentally verified. It is confirmed that thermal phase noise cannot be overlooked for the giant IFOGs. Utilizing high order eigen frequency modulation can effectively suppress the walk-off component of thermal phase noise, but the residual part contributes to high-frequency range thus limits the detection bandwidth of giant IFOGs. The self-noise is experimentally demonstrated as 3.5 nrad/s/Hz at low frequencies and 5.2 nrad/s/Hz at 100 Hz in the IFOG with a 30-km single mode fiber coil. Discussions about the fiber characteristics on thermal phase noise are presented, which paves the way to the design of giant IFOGs.