基于倾斜布拉格光纤光栅的高灵敏度折射率传感器  

High sensitivity refractive index sensor based on tilted fiber Bragg gratings

作　　者：石磊[1] 刘云启[1] 宋红亮[1] 邹芳[1] 王廷云[1] SHI Lei;LIU Yunqi;SONG Hongliang;ZOU Fang;WANG Tingyun(Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, Chin)

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200444

出　　处：《上海大学学报（自然科学版）》2017年第6期859-864,共6页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(61377083;61077065)

摘　　要：制备了不同倾斜角度的倾斜布拉格光纤光栅,用于测量周围环境的折射率.当环境折射率增加时,高阶包层模谐振峰会逐渐消失,即将逐渐消失的高阶包层模谐振峰的波长会随环境折射率的增大而线性增大.测得的折射率灵敏度在500 nm/RIU以上.通过选择适当的倾斜角度,制得的光纤传感器可以满足不同范围的折射率测量.We demonstrate fabrication of tilted fiber Bragg gratings （TFBGs） with dif- ferent tilt angles for the measurement of surrounding refractive index （SRI）. High or- der cladding modes has been found to disappear gradually, with their resonance wave- length linearly increasing as SRI increases. The measured index sensitivity is higher than 500 nm/RIU. By optimizing the tilt angle of the grating, the proposed optical fiber sensor can be used for SRI measurements in different index range.

关 键 词：倾斜布拉格光纤光栅 环境折射率 光纤传感器 

分 类 号：TN253[电子电信—物理电子学]