基于细芯光纤结构的表面等离子体共振折射率传感器  

Surface plasmon resonance refractive index sensor based on thin-core optical fiber structure

作　　者：王雨 韩飞 郎婷婷 赵春柳 WANG Yu;HAN Fei;LANG Tingting;ZHAO Chunliu(College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China)

机构地区：[1]中国计量大学光学与电子科技学院

出　　处：《光通信技术》2019年第8期32-34,共3页Optical Communication Technology

基　　金：国家重点研发专项(批准号:2017YFC0805905)资助

摘　　要：表面等离子体共振(SPR)传感器常用的光纤处理方法易使光纤结构脆弱,从而导致机械性能下降,提出了一种基于细芯光纤(TCF)SPR原理的折射率传感器.通过使用单侧均匀涂覆金(Au)膜的多模光纤-细芯光纤-多模光纤(MMF-TCF-MMF)结构作为传感单元,折射率传感器能够在1.34~1.4161的范围内达到3045.69 nm/RIU的衰减谷宽度灵敏度和48.09 dB/RIU的能量损耗灵敏度;在1.34~1.3797的范围内达到112.21 nm/RIU的SPR峰波长灵敏度和-86.27 dB/RIU的SPR峰值灵敏度.实验结果表明:与传统SPR传感器相比,该传感器易制备,且机械稳定性和灵敏度高.The common optical fiber processing methods of surface plasmon resonanee(SPR) sensors can easily make the optical fiber structure fragile, which leads to the decline of mechanical properties. A refractive index sensor based on thin core fiber(TCF) surface plasmon resonance SPR principle is proposed. Multimode optical fiber-thin core optical fiber-multimode optical fiber(MMF-TCF-MMF) structure with uniformly coated gold(Au) film on one side is used as sensing unit, and the refractive index sensor can reach 3045.69 nm/RIU attenuation Valley width sensitivity and 48.09 dB/RIU energy loss sensitivity in the range of 1.34~1.3797, and 112.21 nm/RIU SPR peak wavelength sensitivity and -86.27 dB/RIU SPR peak wavelength sensitivity in the range of 1.34~1.3797. PR peak sensitivity. The experimental results show that compared with traditional SPR sensors, the sensor is easy to fabricate and has high mechanical stability and sensitivity.

关 键 词：表面等离子体共振 细芯光纤 折射率光纤传感器 

分 类 号：TN212[电子电信—物理电子学]