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《Chinese Journal of Lasers》 2017-10
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Estimation of Distributed Polarization Coupling Error in Optical Fiber Coil of Fiber Optic Gyroscope

Xie Ze;Yang Yuanhong;Yan Han;Yang Fuling;School of Instrument Science and Opto-Electronics Engineering,Beihang University;  
The distributed polarization coupling data measured by optical coherence domain polarizer in polarization maintaining optical fiber coil(PMFC)of fiber optic gyroscope is analyzed,and a polarization coupling amplitude model of measurement point is established.It is found that the polarization amplitude coupling is modulated by broadband source coherence function,and there exists pseudo polarization coupling measurement data.Based on this,a data processing algorithm for distributed polarization coupling data is proposed and implemented.PMFC is fabricated to conduct distributed polarization coupling tests at different temperatures,and the true coupling position and intensity information are extracted.The estimation model of secondary polarization coupling error of PMFC is established,and the bias drift error of fiber optic gyroscope induced by the distributed polarization coupling in fiber coil at different temperatures is estimated.With a high precision polarization maintaining fiber coil analyzer,the bias drift of fiber coil gyroscope is measured at corresponding temperature experimentally.The estimated results agree with the experimental results well.
【Fund】: 国家重大科学仪器设备开发专项(2013YQ04081504);; 国家自然科学基金(61227902 U1637106);; 航空科学基金(20140851012);; 创新团队发展计划(IRT1203);; 区域光纤通信网与新型光通信系统国家重点实验室开放基金(2016GZKF001)
【CateGory Index】: TN96
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