基于光纤表面波导和光纤布拉格光栅的同时折射率和温度传感

Simultaneous refractive index and temperature sensing based on a fiber surface waveguide and fiber Bragg gratings.

作者信息

Chen Qi, Wang D N, Gao Feng

出版信息

Opt Lett. 2021 Mar 15;46(6):1209-1212. doi: 10.1364/OL.419636.

DOI:10.1364/OL.419636

PMID:33720149

Abstract

An optical fiber sensor based on a fiber surface waveguide and Bragg grating is proposed for a simultaneous refractive index (RI) and temperature sensing. The device consists of two fiber Bragg gratings fabricated by a femtosecond laser, one of which is situated in the fiber core for temperature sensing; the other is located in the fiber surface waveguide for both temperature and RI measurements. The RI and temperature sensitivities achieved are 10.3 nm/RIU and 9.94 pm/°C, respectively. The device is featured with a compact structure, high robustness, and convenient operation.

摘要

提出了一种基于光纤表面波导和布拉格光栅的光纤传感器，用于同时进行折射率（RI）和温度传感。该装置由两个用飞秒激光制作的光纤布拉格光栅组成，其中一个位于光纤芯中用于温度传感；另一个位于光纤表面波导中用于温度和RI测量。所实现的RI和温度灵敏度分别为10.3 nm/RIU和9.94 pm/°C。该装置具有结构紧凑、高鲁棒性和操作方便的特点。