扭转抑制光纤陀螺法拉第效应的理论研究

光纤陀螺法拉第磁光效应作为非互易性误差源,是影响光纤陀螺性能,尤其是影响光纤陀螺精度的主要原因之一。介绍了光纤陀螺的磁敏感机理,分析了光纤陀螺径向和轴向磁敏感性误差的主要来源。提出了通过在光纤陀螺原有光纤环上熔接反向扭转光纤的方法,引入比较高的圆双折射,对原有光纤环的非互易相位差进行补偿,达到抑制光纤陀螺磁敏感性误差的目的,探讨了该方法的可行性,并对补偿特征进行了仿真分析。

Research on the approach of restraining Faraday effect of fiber optic gyroscope with reverse twist optical fiber

Fiber optic gyroscope Faraday effect as nonreciprocity error source is affect the performance of the fiber optic gyro, especially affected the precision of fiber optic gyro is one of the main reasons. This paper introduces the magnetic sensitive mechanism of fiber optic gyro, analyzes the main source of fiber optic gyro radial and axial magnetic sensitivity error. To improve the torsion of circular birefringence fiber rate, using coupled wave equation of twisted fiber, has been a evaluation of twist fiber circular birefringence expression level. Based on the above analysis, this paper puts forward through in fiber optic gyro original fiber ring weld reverse torsion fiber method, relatively high circular birefringence is introduced, the compensation of the original fiber ring nonreciprocal phase difference, so as to restrain the sensitivity error of fiber optic gyro magnetic, probes into the feasibility of the method.And simulation and analysis of the compensation characteristics of the optical fiber torsion compensation method are carried out.