Open AccessCross-coupling drift between magnetic field and temperature in depolarized interferometric fiber optic gyroscope
Author(s) -
L Chen,
Yuxiang Zhao,
Min Yang,
D W Zhang,
Xiaowu Shu,
C Liu
Publication year - 2019
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.27.006003
Subject(s) - birefringence , fibre optic gyroscope , magnetic field , optics , coupling (piping) , interferometry , gyroscope , materials science , optical fiber , sagnac effect , physics , quantum mechanics , metallurgy
We propose a theory of cross-coupling drift in depolarized interferometric fiber optic gyroscopes (D-IFOGs) under the joint influence of magnetic field and temperature. The magnetic field and temperature cross-coupling drift (MTCD) originates from the interaction of the nonreciprocal circular birefringence produced by the magnetic field, the thermal stress birefringence from the varying temperature, and the inherent residual birefringence in the fiber coil. The MTCD is much greater than the sum of the individual drifts induced by magnetic field and temperature. We established a relevant theoretical model and carried out numerical simulations, and verified the results experimentally. For a typical D-IFOG, the experimental results showed a cross-coupling degree exceeding 170% when the temperature varied from -20 °C to 60 °C, as predicted in the simulations.