光纤陀螺光纤环轴向磁敏感性研究

磁敏感性是光纤陀螺(FOG)的主要误差源之一，而光纤环是主要的敏感源。在外界磁场作用下，光纤陀螺中会产生一个非互易相位差，影响陀螺的精度。相关实验表明保偏(PM)光纤环中轴向磁敏感性比径向磁敏感性更显著。主要从三个方面研究了轴向磁场对光纤陀螺的影响机理，包括轴向磁场平行分量引起的光纤随机扭转法拉第磁场漂移、光纤几何扭转引起的法拉第非互易相位差以及轴向磁场垂直分量引起的非法拉第非互易相位差。对理论结果进行了仿真分析和实验验证，结果表明：由垂直分量磁场引起的非互易相位差是光纤陀螺轴向磁敏感性的主要原因，其大小与光纤环骨架半径密切相关；骨架半径越小的光纤环，轴向磁敏感性越强。

Abstract

The magnetic field sensitivity is the main source of errors in fiber optic gyroscope (FOG) and the optical fiber coil is a major sensitive source. In an external magnetic field, a nonreciprocal phase error will be generated in a FOG and decrease the gyro precision. Related experimental results show that the axial magnetic field sensitivity in the polarization maintaining (PM) fiber coils is more obvious than the radial magnetic field sensitivity. The axial magnetic field sensitivity is studied, including Faraday shift caused by fiber random twist, Faraday nonreciprocal phase caused by geometry twist and non-Faraday nonreciprocal phase caused by vertical component magnetic field. Theoretical results are simulated and verified by the experiments. Results show that nonreciprocal phase caused by vertical component magnetic field is the main reason for axial magnetic field sensitivity and closely related to the fiber coil′s skeleton radius. Furthermore, the smaller the skeleton radius is, the greater the axial magnetic field sensitivity will be.

参考文献

[1] Zhang Guicai. The Principles and Technologies of Fiber-Optic Gyroscope[M]. Beijing: National Defence Industry Press, 2008.

[2] Sheng Zhongyan, Zhou Kejiang, Ye Wei. The miniaturization techniques of fiber optic gyro(FOG)[J]. Laser & Infrared, 2000, 30(1): 53-55.

[3] Wu Junwei, Miao Lingjuan, Xu Gang, et al.. Technology of miniature tri-axis FOG[J]. Infrared and Laser Engineering, 2010, 39(5): 950-953.

[4] Wang Lihui, Xu Xiaosu, Liu Xixiang, et al.. Investigation on modeling methods of axial magnetic field error characteristics in small fiber optic gyroscope[J]. Journal of Chinese Inertial Technology, 2012, 20(1): 84-89.

[5] Zhang Dengwei, Dong Dandan, Chen Kan, et al.. Research on the vertical magnetic drift in fiber optical gyroscope[J]. Chinese J Lasers, 2014, 41(1): 0105004.

[6] Kazuo Hotate, Kunio Tabe. Drift of an optical fiber gyroscope caused by the Faraday effect: Influence of the earth′s magnetic field[J]. Appl Opt, 1986, 25(7): 1086-1092.

[7] Zhang Dengwei, Shu Xiaowu, Mou Xudong, et al.. Theoretical study on radial magnetic field in fiber-optic depolarized gyro[J]. Chinese Journal of Sensors and Actuators, 2005, 18(4): 867-870.

[8] V N Logozinskii. Magnetically induced non-Faraday nonreciprocity in a fiber-optic gyroscope[J]. Journal of Communications Technology and Electronics, 2006, 51(7): 836-840.

[9] Dengwei Zhang, Yuxiang Zhao, Xiaowu Shu, et al.. Magnetic drift in single depolarizer interferometric fiber-optic gyroscopes induced by orthogonal magnetic field[J]. Optical Engineering, 2013, 52(5): 054403.

[10] Jingren Qian, Weiping Huang. Coupled-mode theory for LP modes[J]. Journal of Lightwave Technology, 1986, 4(6): 619-625.

[11] Wang Xiaxiao, Song Ningfang, Zhang Chunxi, et al.. Experimental study on magnet sensitivity of fiber optic gyro[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(10): 1116-1120.

[12] Li Chuansheng. Investigation on Analysis and Suppression Technique for Polarization Errors of Sagnac Interferometer-Type Fiber-Optic Current Transformer[D]. Beijing: Beihang University, 2013.

[13] Xisheng Fang, Zongqi Lin. Field in single-mode helically-wound optical fibers[J]. IEEE Transactions on Microwave Theory and Techniques, 1985, 33(11): 1150-1154.

[14] Wang Xiaxiao, Qin Yi, Yu Jia, et al.. Study on geometrical axial magnetic field sensitivity in PM optical fiber coil of fiber optic gyroscope[J]. Laser & Optoelectronics Progress, 2014, 51(12): 120601.

王夏霄, 冯志芳, 秦祎, 于佳, 吕江涛. 光纤陀螺光纤环轴向磁敏感性研究[J]. 中国激光, 2015, 42(8): 0805005. Wang Xiaxiao, Feng Zhifang, Qin Yi, Yu Jia, Lü Jiangtao. Study on the Axial Magnetic Field Sensitivity in Optical Fiber Coil of Fiber Optic Gyroscope[J]. Chinese Journal of Lasers, 2015, 42(8): 0805005.

光纤陀螺光纤环轴向磁敏感性研究

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