光纤表面等离子体共振传感器锥型探头的研制  

Study and Fabricate of Surface-Plasmon-Resonance Fiber Optic Sensor with Tapered Probe

作　　者：张鹏程[1] 吕敏[1] 陈笑[1] 王义全[1] 

机构地区：[1]中央民族大学理学院,北京100081

出　　处：《中国激光》2013年第3期136-140,共5页Chinese Journal of Lasers

基　　金：中央高校基本科研业务费专项资金资助项目(1112KYZY46);教育部科学技术研究重点项目(212205);(98507-012009);工程项目资助课题

摘　　要：理论模拟并实验制作了一种基于波长调制的高灵敏度的锥型光纤探头表面等离子体共振传感器。理论上研究了锥型探头的锥度比(TR)与传感器灵敏度和检测精度的关系,结果表明,随着锥度比的增加,传感器灵敏度上升,精确度下降。综合考虑这两个指标,当TR在1.2至1.8之间时,传感器有较高的性能。在理论设计的基础上,实验制作了锥型探头,并且搭建了实验系统,实验结果显示,传感器灵敏度达到3.94μm/RIU(RIU表示折射率单位),与理论模拟值(3.90μm/RIU)符合得很好。A high sensitivity of surface-plasmon-resonance （SPR） fiber optic sensor based on the wavelength modulation with tapered probe is studied theoretically and fabricated. The influence of different taper ratios （TRs） on the sensitivity and accuracy of the sensor is analyzed. It shows that with the increase of the TR, the sensitivity increases and the accuracy reduces. Considering the two indicators, the sensor has a good performance when TR is between 1.2-1.8. Based on the theoretical simulation result, the tapered probe is fabricated and the experimental system is set up. The experimental results show that the sensitivity of the sensor is 3.94 μm/RIU, which is well consistent with the result of theoretical simulation （3.90 μm/RIU）.

关 键 词：传感器 表面等离子体共振 光纤传感器 锥型探头 灵敏度 

分 类 号：O439[机械工程—光学工程]