Theory and compensation method of axial magnetic error induced by axial magnetic field in a polarization-maintaining fiber optic gyro

Yanru Zhou; Yuxiang Zhao; Hui Tian; Dengwei Zhang; Tengchao Huang; Lijun Miao; Xiaowu Shu; Shuangliang Che; Cheng Liu

doi:10.1117/1.OE.55.12.126106

17 December 2016 Theory and compensation method of axial magnetic error induced by axial magnetic field in a polarization-maintaining fiber optic gyro

Yanru Zhou, Yuxiang Zhao, Hui Tian, Dengwei Zhang, Tengchao Huang, Lijun Miao, Xiaowu Shu, Shuangliang Che, Cheng Liu

Author Affiliations +

Optical Engineering, Vol. 55, Issue 12, 126106 (December 2016). https://doi.org/10.1117/1.OE.55.12.126106

Abstract

In an axial magnetic field (AMF), which is vertical to the plane of the fiber coil, a polarization-maintaining fiber optic gyro (PM-FOG) appears as an axial magnetic error. This error is linearly related to the intensity of an AMF, the radius of the fiber coil, and the light wavelength, and also influenced by the distribution of fiber twist. When a PM-FOG is manufactured completely, this error only appears a linear correlation with the AMF. A real-time compensation model is established to eliminate the error, and the experimental results show that the axial magnetic error of the PM-FOG is decreased from 5.83 to 0.09 deg/h in 12G AMF with 18-dB suppression.

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Yanru Zhou, Yuxiang Zhao, Hui Tian, Dengwei Zhang, Tengchao Huang, Lijun Miao, Xiaowu Shu, Shuangliang Che, and Cheng Liu "Theory and compensation method of axial magnetic error induced by axial magnetic field in a polarization-maintaining fiber optic gyro," Optical Engineering 55(12), 126106 (17 December 2016). https://doi.org/10.1117/1.OE.55.12.126106

Received: 9 July 2016; Accepted: 21 November 2016; Published: 17 December 2016

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