基于等离子体共振效应的光纤表面等离子体共振传感器的理论研究  

Theoretical Research of Fiber-optic Sensors Based on Surface Plasmon

作　　者：付丽辉[1,2] 尹文庆[2] 

机构地区：[1]淮阴工学院自动化学院,江苏淮安223003 [2]南京农业大学工学院,江苏南京210031

出　　处：《仪表技术与传感器》2016年第9期13-16,93,共5页Instrument Technique and Sensor

基　　金：江苏省普通高校研究生科研创新计划项目(CXLX12_0277);江苏省教育厅自然基金项目(13KJD510002)

摘　　要：以等离子共振效应为基础,对等离子共振以及光纤传感的结构细节进行阐述,利用MATLAB软件模拟研究金属膜复介电常数虚部及实部、金属膜层厚度、光纤纤芯折射率、环境介质折射率对光纤表面等离子体共振反射谱性质的影响,对这些参数在性能特点上进行分别讨论,最后,在研究影响激发SPR现象因素和反射谱随性能参数变化规律的基础上,讨论了光纤SPR传感器波长调制型测量方法的可行性。从而为进一步提高表面等离子体共振传感器的灵敏度和检测精度以及光纤传感系统的优化设计提供理论指导。Based on the theory of Surface Plasmon Resonance（SPR） ,the technique of Surface Plasmon Resonance was de- scribed and a detailed mechanism of the Fiber-Optic sensing was discussed.The influence of the real and imaginary part of metal membrane＇dielectric constant, the thickness of the metal,the refraction index of the fiber core and environment medium, and SPR reflective spectral properties were simulated by MATLAB.The main performance parameters of SPR sensors were respectively dis- cussed.Finally, based on the research of influential factor in inspiring SPR phenomenon and the change regularities of reflective spectrum with performance parameters, the feasibility of wavelength modulating SPR Sensors was discussed, which provided a the- oretic guide for improving the sensitivity and accuracy of Surface Plasmon Resonance（SPR） sensor and the optimization design of fiber SPR sensor system.

关 键 词：光纤 传感器 等离子共振 折射率 共振波长 仿真 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]