为研究中、高精度光纤陀螺用保偏光纤环的温度性能,从制造工艺及受环境温度影响的角度分析了影响光纤环性能的主要因素。利用耦合波概念定性讨论了光纤环中光波信号的偏振耦合特性,指出了影响光纤陀螺性能的主要偏振误差。根据光纤环中感应双折射的变化和温度瞬态效应机理,建立了温度实验系统。实验结果表明,在变温影响下,光纤环中光信号偏振态的变化十分显著,且与整个光纤环的具体温度分布有关。而且,该实验系统还可以作为光纤环的温度性能评价系统用来筛选出性能优秀的光纤环。

In order to study the temperature performance of polarization maintaining fiber coil which is used in middling or high precision fiber optic gyroscope (FOG),the main reasons affecting the performance of fiber coil are analyzed from the viewpoint of the manufacturing process and the temperature changes of external environment. The light wave signal’s polarization cross-coupling of the interferometer is qualitative analyzed by using coupled wave idea,and the major polarization errors which affect the performance of FOG are pointed out. According to the transient state of temperature effects of fiber coil,the temperature test system is established to study the signal polarization’s changes in fiber coil. Experimental results show that the polarization state of the optical signals is affected by temperature in fiber coil,and also is concerned with temperature distribute of the whole fiber coil. In addition,this system can be used as the performance evaluation system to filter fiber coils with outstanding performance.