光纤表面等离体激元共振传感器中光传播特性的理论分析  

Theoretical Study on the Light-Propagation Property of an Optical Fiber Surface Plasmon Resonance Sensor

作　　者：杨军[1] 战磊[1] 吴松[1] 田浩[1] 刘琳琳[1] 杨静[2] 宫兆涛 郑小林[1] 

机构地区：[1]重庆大学生物工程学院,重庆400030 [2]重庆通信学院军事信息工程系,重庆400035 [3]重庆金山(科技)集团有限公司,重庆401120

出　　处：《传感技术学报》2010年第10期1421-1425,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金资助项目(30870661;30770569);重庆市科技资助项目(CSTC2009AB5081;CSTC2009BB5180;CSTC2009DA0001-B17;CSTC2010AC5029);教育部"新世纪优秀人才支持计划"项目资助(NCET-09-0842)

摘　　要：光纤表面等离体激元共振传感器是一种易于小型化的SPR传感器,常用于开发便携式传感检测设备,也可用于远距离实时在线检测。在本研究中,采用特制光纤作为导光介质来制作一种新的光纤SPR传感器。由于光纤中光传播相当复杂,仅凭过往经验来设计传感器将不能保证其检测精度。因此,针对本研究中光纤的特点,建立了光纤中光传播模型,并结合菲涅耳公式推导出该类光纤SPR传感器中光总反射系数与光波长的关系,最终绘制出理论SPR曲线并计算出共振波长。研究结果为该类光纤SPR传感器的设计及光谱分析提供了重要理论依据。Optical fiber surface plasmon resonance（SPR）sensor is easy for miniaturization,which is usually used for developing portable analytical devices and can also be used for remote real-time detection.In this study,a tailor-made optical fiber is used to guide light in a novel optical fiber SPR sensor.Because light propagation within optical fiber is rather complex,experience based sensor design cannot insure its precision.Thus,according to the property of the optical fiber used in this study,a light-propagation model is set up and Fresnel equation is used to educe the relationship between the total reflectance of light and the light wavelength.Finally,theoretical SPR curve is drawn and resonance wavelength is achieved.This study provides an important theoretical base for the design and spectral analysis of this kind of optical fiber SPR sensor.

关 键 词：表面等离体激元共振 光传播模型 光纤 共振波长 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]