薄膜干涉型光纤温度传感器的偏振特性  

Polarization characteristics of thin-film interference optical fiber temperature sensor

作　　者：高晓丹[1] 刘岚[1] 姚敏[1] 魏纯[1] GAO Xiaodan;LIU Lan;YAO Min;WEI Chun(College of Electronic Information Engineering,Wuhan Donghu University,Wuhan 430212,China)

机构地区：[1]武汉东湖学院电子信息工程学院,湖北武汉430212

出　　处：《传感器与微系统》2023年第10期13-16,共4页Transducer and Microsystem Technologies

基　　金：湖北省教育厅科学技术研究计划项目(B2022312)。

摘　　要：薄膜干涉型光纤传感器的传感特性主要取决于敏感薄膜。当光倾斜入射敏感薄膜时,p-偏振光和s-偏振光分离,会产生偏振效应。通过对光纤温度传感器的温度感测原理与偏振效应分析,采用光学薄膜的特征矩阵干涉理论,构建了具有偏振特性的光纤温度传感器理论模型。模拟了反射光谱在不同温度下的偏振特性,分析了偏振效应对薄膜干涉型光纤传感器温度传感特性的影响。结果表明:相对于待测量温度而言,反射光谱干涉条纹的波长漂移对偏振效应更加敏感。通过对敏感薄膜反射光谱的波长漂移来进行物理量感测的温度、湿度、折射率等薄膜干涉型光纤传感器,有必要考虑敏感元件偏振效应的影响,以提高传感器的精度和研制效率。The sensing characteristics of thin-film interference optical fiber sensors mainly depend on the sensitive film.When light is obliquely incident on the sensitive film,p-polarized light and s-polarized light are separated,resulting in a polarization effect.By analyzing the temperature sensing principle and polarization effect of optical fiber temperature sensor,the theoretical model of optical fiber temperature sensor with polarization characteristics is constructed by using the characteristic matrix interference theory of optical film.The polarization characteristics of the reflection spectrum at different temperatures are simulated,and the influence of the polarization effect on the temperature sensing characteristics of the thin-film interference optical fiber sensor is analyzed.The results show that the wavelength shift of the interference fringes of the reflection spectrum is more sensitive to the polarization effect than the temperature to be measured.It is necessary to consider the influence of the polarization effect of the sensitive element to improve the accuracy and development efficiency of the thin-film optical fiber sensor that senses temperature,humidity,refractive index and other physical quantities through the wavelength shift of the sensitive thin film reflection spectrum.

关 键 词：光纤传感器 薄膜 偏振效应 干涉 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN29[自动化与计算机技术—控制科学与工程]