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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 ring for medium and high precision fiber optic gyroscope, the main factors influencing the performance of the fiber ring were analyzed from the perspective of manufacturing process and environmental temperature. The concept of coupling wave was used to qualitatively discuss the polarization coupling characteristics of optical signals in fiber rings. The main polarization errors affecting the performance of fiber optic gyroscopes were pointed out. According to the change of induced birefringence in fiber ring and the mechanism of temperature transient effect, a temperature experiment system was established. The experimental results show that under the influence of temperature, the polarization state of the optical signal in the fiber ring is very significant, which is related to the specific temperature distribution of the fiber ring. Moreover, the experimental system can also be used as a fiber ring temperature performance evaluation system used to screen out a good performance of optical fiber ring.