Open AccessSuppressing polarization non-reciprocity error with reverse phase modulation in dual-polarization fiber optic gyroscopes
Author(s) -
Yulin Li,
Rongya Luo,
Fangyuan Chen,
Sheng Deng,
Dong He,
Chao Peng,
Zhengbin Li
Publication year - 2018
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.26.034150
Subject(s) - fibre optic gyroscope , optics , gyroscope , polarization (electrochemistry) , interferometry , phase modulation , physics , sagnac effect , dual polarization interferometry , polarization maintaining optical fiber , optical fiber , fiber optic sensor , materials science , phase noise , telecommunications , computer science , chemistry , quantum mechanics , antenna (radio)
In a dual-polarization interferometric fiber optic gyroscope (IFOG), polarization non-reciprocity (PN) errors are significant, which degrades the IFOG performance due to the polarization coupling between two orthogonal axes. A dual-polarization IFOG with reverse phase modulation is proposed in which PN phase error can be sufficiently suppressed. In our scheme using a 2-km polarization maintaining coil with open-loop configuration, angle random walk of 4.62×10 -4 °/h and a bias instability of 4.6 × 10 -4 °/h is demonstrated in detecting the Earth's rotation rate.