中文摘要：

灵敏度是衡量传感器的重要指标之一,基于双折射光纤环镜（PM-FLM）应变传感器灵敏度理论模型,通过数值模拟与实验的方法,在不增加系统复杂性的前提下,通过自身性能优化PM-FLM轴向应变灵敏度;同时研究了双折射光纤（PMF）长度对PM-FLM轴向应变灵敏度的影响。研究结果表明：对于相同PM-FLM,可以选择长波长监测点优化轴向应变灵敏度;对于双折射率相同的PM-FLM,可以选择双折射应变系数较大的PMF优化轴向应变灵敏度。对于双折射应变系数相同的PM-FLM,可以选择双折射率较小的PMF优化轴向应变灵敏度。PM-FLM传感器应变灵敏度与PMF长度无关。

英文摘要：

Sensitivity is one of the important performances for sensor.Without increasing system complexity,this paper studied the influence of self-performance and polarization maintaining fiber（PMF）length on the axial strain sensitivity of polarization maintaining loop mirror（PM-FLM）based on the theoretical model of PM-FLM by numerical simulation and experiments.The results show that we can choose a long wavelength point as a monitoring point to optimize the axial strain sensitivity for the same PM-FLM,a high strain dependent birefringence coefficient PMF to optimize the axial strain sensitivity for the PM-FLM with the same birefringence,a low birefringence PMF to optimize the axial strain sensitivity for the PM-FLM with the same strain dependent birefringence coefficient and the axial strain sensitivity is unrelated to PMF length.