光纤SPR传感器测量液体折射率的研究

Study on Liquid Refractive Index Measured by the Optic Fiber Surface Plasmon Wave Sensor

通过一套基于表面等离子体波共振(SPR)效应的新型光纤传感系统,对三种具有相同折射率而类型不同的液体介质进行测试。通过研究SPR传感探头在四种不同液体介质中的光谱输出特性,获得SPR光谱共振波长、最小光强反射率随液体折射率、类型不同而改变的特性。这些工作为下一步使用光纤SPR传感探头进行复合材料的固化监测以及加工成型后的应变检测提供了依据。

Using an optical fiber sensing setup based on SPR effect, three different kinds of liquids which have the same refractive index are measured in this paper. SPR spectrum characteristics are analyzed by plugging SPR probe into four different kinds of liquid mediums. SPR spectrum outputted property is obtained according to experimental results, Which resonance wavelength and the lowest light intensity reflectivity vary with the change of liquid refractive index and type. This new technology also opens up a new route to realize the real-time cure monitor and detecting of strain of composite material.