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

摘要:

实现了一种单模-空芯-单模(SHS)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 pm/με和-4.26pm/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。

Abstract:

A single mode-hollow core-single mode (SHS) fiber microstructure strain sensor is implemented. The wavelength strain relationship model is established by beam propagation method, and the strain and temperature characteristics of SHS are experimentally studied. The experimental results show that the tensile strain sensitivity in the range of 0~340με and the compressive strain sensitivity in the range of -340~0με are as high as -4.19pm/με and -4.26pm/με, and the linearity is 0.9971 and 0.9981 respectively. In the range of 20~70℃, the temperature sensitivity is 9.6pm/℃, and the linearity reaches 0.9909. The sensor is simple to make and has high strain sensitivity, which can realize strain measurement.