利用光子晶体光纤(PCF)的选择性填充特性，设计了一种具有较高灵敏度的液晶填充PCF电压传感结构。PCF中一个空气孔镀纳米金薄膜作为表面等离子体共振通道，并填充E7液晶作为电压灵敏介质，实现对较低电压的检测。利用全矢量有限元法对传感特性进行仿真研究。结果表明，在环境温度20 ℃下，在0~50 V低电压范围内，该结构电压传感灵敏度最高可达1.94 nm/V，且具有很好的线性度。

Based on the selective infiltrated characteristics of Photonic Crystal Fiber (PCF), a liquid crystal fiber optic voltage sensing structure with high sensitivity is designed. In the PCF, one air hole coated gold nano layer is used as a Surface Plasmon Resonance (SPR) channel, and the liquid crystal of E7 is used as a voltage sensitive medium to realize the detection of lower voltage. The Full vector finite Element Method (FEM) is used to simulate the characteristics of the sensing structure. The results show that the sensing sensitivity of the structure is up to 1.94 nm/V with a good linearity in the low voltage range of 0~50 V when the ambient temperature is 20 ℃.