单模-空芯-单模光纤微结构应变传感特性研究

Research on the Strain Sensing Characteristics of Single Mode-Hollow Core-Single Mode Optical Fiber Microstructure

设计了一种单模-空芯-单模光纤微结构应变传感器,利用光束传播法进行仿真分析,建立了波长-应变关系模型,并对其应变特性、温度特性进行实验研究。实验结果表明,在0~340με范围内的拉伸应变灵敏度和-340~0με范围内的压缩应变灵敏度分别高达-4.19和-4.26 pm/με,线性度分别为0.9971和0.9981;在20~70℃范围内的温度灵敏度为9.6 pm/℃,线性度达到0.9909。该传感器制作简单且具有较高的应变灵敏度,可以实现应变测量。

A single mode-hollow core-single mode(SHS)fiber microstructure strain sensor was proposed.A wavelength strain relationship model was established using the beam propagation method,and the strain and temperature characteristics of the SHS were experimentally studied.The experimental results showed that the tensile strain sensitivity in the range of 0~340μεand compressive strain sensitivity in the range of-340~0μεwere as high as-4.19 pm/μεand-4.26 pm/με,respectively,with linearity values of 0.9971 and 0.9981,respectively.In the range of 20~70℃,the temperature sensitivity was 9.6 pm/℃,and the linearity reached 0.9909.This sensor is simple to make and has a high strain sensitivity.