应用于液压传感的光子晶体光纤特性

为实现结构紧凑、高灵敏度的光纤压力(液压)传感器,提出了一种应用于液压传感的边孔结构光子晶体光纤.基于全矢量有限元方法,研究了传统光子晶体光纤和边孔结构光子晶体光纤的有效折射、模式等特性以及在液压情况下的应力和应力特性.根据光弹效应给出了传统光子晶体光纤和边孔结构光子晶体光纤在液压情况下的折射率变化特性.模拟结果表明边孔结构光子晶体光纤可以获得更大的液压传感灵敏度,增大边孔半径可以提高液压传感灵敏度,因此结构优化的边孔结构光子晶体光纤可以实现高灵敏度的光纤压力(液压)压力传感器.

Characteristics of Photonic Crystal Biber for Hydraulic Pressure Sensing

A side-hole photonic crystal fiber for (hydrostatic) pressure sensing was proposed to achieve compact and high sensitivity fiber based pressure sensor. The effective index, mode profile and the stress property of a conventional photonic crystal fiber and the side-hole photonic crystal fiber were investigated based on a full-vector finite-element method. Due to the photoelastic effect, the hydrostatic pressure induced index changes of the conventional photonic crystal fiber and the side-hole photonic crystal fiber were presented. Simulation results show that the side-hole photonic crystal fiber can achieve higher pressure sensitivity, and the pressure sensitivity increases together with the radius of big air holes of the side-hole photonic crystal fiber. Thus, the structure-optimized side-hole photonic crystal fiber can be used as a high sensitivity (hydrostatic) pressure sensor.