单芯光子晶体光纤边孔SPR折射率传感特性研究  

Study on side-hole surface plasmon resonance refractive index sensing based on single-core photonic crystal optical fiber

作　　者：彭荣荣[1] 刘彬[2] 陈佳[1] PENG Rongrong;LIU Bin;CHEN Jia(Department of Basic Courses,Nanchang Institute of Technology,Nanchang 330108,China;Jiangxi Engineering Laboratory for Optoelectronics Testing Technology,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌工学院基础教学部,南昌330108 [2]南昌航空大学江西省光电检测技术工程实验室,南昌330063

出　　处：《激光技术》2018年第5期713-717,共5页Laser Technology

基　　金：江西省教育厅科技计划资助项目(GJJ151240);江西省自然科学基金资助项目(20161BAB202039)

摘　　要：为了实现高灵敏的表面等离子体共振(SPR)折射率传感,提出一种基于大纤芯的单芯光子晶体光纤SPR传感结构,采用全矢量有限元方法对其传感特性进行了数值仿真和分析。结果表明,该结构具有比较宽的折射率传感范围(1.36~1.55),同时具有较高的传感灵敏度,平均传感灵敏度达12139nm/RIU;在折射率1.36~1.42区域,线性传感灵敏度为5646.4nm/RIU,线性度为0.9317;而在折射率1.42~1.57区域,传感灵敏度达到15326.8nm/RIU,线性度为0.98738,传感特性出现明显的线性分段情况。该研究结果为实现高灵敏的光子晶体光纤SPR传感器提供了重要的理论依据。In order to detect the refractive index of surface plasmon resonance （SPR ） with high sensitivity, a SPR sensing structure based on single core photonic crystal fiber with large core was proposed . The full vector finite element method was used to simulate and analyze its sensing characteristics. The results show that the structurange （1. .6 ？1.55） . At the same time, the structure has high sensing sensitivity and the average sensitivity is 12139 nrm/R IU . With refractive index of 1. .6 ？1.42,the linear sensor sensitivity is 5646. 4nrm/R IU and linearity is 0. 9317. With refractive index of 1.42 ？1.57, the linear sensor sensitivity is 15326. Snm/RIU and linearity is 0. 98778. Sensing characteristics appear in obvious linear subsections. The results provide an important theoretical basis for the realization of high sensitive photonic costalfiber SPR sensors.

关 键 词：光纤光学 光子晶体光纤传感 有限元 表面等离子体共振 

分 类 号：TN253[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]