Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Yanru Zhou, Yuxiang Zhao, Dengwei Zhang, Tengchao Huang, Lijun Miao, Xiaowu Shu, Shuangliang Che, Cheng Liu

Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, Hangzhou, Zhejiang 310027, China

Hui Tian

Zhejiang University, Women's Hospital, School of Medicine, Hangzhou, Zhejiang 310006, China

Opt. Eng. 55(12), 126106 (Dec 17, 2016). doi:10.1117/1.OE.55.12.126106
History: Received July 9, 2016; Accepted November 21, 2016
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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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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yanru Zhou ; Yuxiang Zhao ; Hui Tian ; Dengwei Zhang ; Tengchao Huang, et al.
"Theory and compensation method of axial magnetic error induced by axial magnetic field in a polarization-maintaining fiber optic gyro", Opt. Eng. 55(12), 126106 (Dec 17, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.126106


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