In this paper, a new hygrometer sensor based on a taper-photonic crystal fiber (PCF)-dislocation structure coated with polyvinyl alcohol/graphene oxide (PVA/GO) composite film is proposed and analyzed by the beam propagation method (BPM) method and experimental measurement. Due to the moisture absorption characteristic, the refractive index (RI) of the PVA/GO composite film changes linearly, so the PCF RI interferometer can realize high sensitivity humidity detection. In order to further promote its sensing performance, we use CO₂ laser lattice to optimize the sensor with a narrower linewidth and an enhanced RI sensitivity. By optimizing the sensing structure and testing the humidity sensitive film, the research results show that the humidity sensitivity can reach 0.0824 nm/%RH in the range of 20%RH-90%RH.

本文提出了一种新的基于锥光子晶体纤维位错结构的聚乙烯醇/氧化石墨烯（PVA / GO）复合膜包覆的湿度传感器，并通过束流传播法（BPM）进行了分析。实验测量。由于具有吸湿特性，PVA / GO复合膜的折射率（RI）呈线性变化，因此PCF RI干涉仪可以实现高灵敏度的湿度检测。为了进一步提高其感测性能，我们使用CO ₂激光晶格以更窄的线宽和增强的RI灵敏度来优化传感器。通过优化传感结构并测试湿敏膜，研究结果表明，在20％RH-90％RH范围内，湿敏度可以达到0.0824 nm /％RH。