High-sensitivity optical fiber relative humidity probe with temperature calibration ability

被引：25
|
作者：
Liang, Lei [1 ]
Sun, Hao [2 ]
Liu, Nan [1 ]
Luo, Hao [1 ]
Gang, Tingting [1 ]
Rong, Qiangzhou [1 ]
Qiao, Xueguang [1 ]
Hu, Manli [1 ]
机构：
[1] Northwest Univ Xian, Sch Phys, Xian 710069, Shaanxi, Peoples R China
[2] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Shaanxi, Peoples R China
来源：
APPLIED OPTICS | 2018年 / 57卷 / 04期
基金：
中国国家自然科学基金;
关键词：
SENSOR; GRATINGS;
D O I：
10.1364/AO.57.000872
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A high-sensitivity optical fiber relative humidity (RH) sensing probe with the ability of temperature calibration is proposed and experimentally demonstrated. It consists of a simple Fabry-Perot interferometer constructed by coating a layer of thin polyimide (PI) film on the end face of single-mode fiber and an upstream fiber Bragg grating (FBG). PI is one of the organic polymer humidity-sensitive materials with good comprehensive properties. The cascaded FBG is used for temperature calibration and elimination of the temperature cross-sensitivity in the process of measuring RH. Experimental results show that this sensing probe can realize simultaneous measurement of temperature and RH. The RH response sensitivity reaches up to 986.25 pm/% RH. This sensing probe with the advantages of simple structure, compact size, high sensitivity, easy packaging, and dual-parameter measurement has an extensive application prospect. (C) 2018 Optical Society of America
引用
收藏
页码：872 / 876
页数：5
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