High sensitivity FBG humidity sensor coated with graphene and polyimide films

被引：29
作者：
Li, Ziwan [1 ,2 ]
Dong, Bo [3 ]
Chen, Enqing [1 ,2 ]
Li, Yang [1 ,2 ]
Zhao, Wei [1 ,2 ]
Wang, Yishan [1 ,2 ]
Gao, Cunxiao [1 ,2 ]
机构：
[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Shenzhen Technol Univ, Coll New Mat & New Energy, Shenzhen 518118, Peoples R China
来源：
OPTICAL FIBER TECHNOLOGY | 2021年 / 66卷
基金：
中国国家自然科学基金;
关键词：
Humidity sensor; Polyimide; Graphene; Fiber Bragg grating;
D O I：
10.1016/j.yofte.2021.102635
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A high sensitivity FBG humidity sensor coated with polyimide and graphene films is proposed. The sensing probe is based on a fiber Bragg grating coated with an inner polyimide film and an outer graphene film. The sensor shows the high humidity sensitivity and experimental results show that its sensitivity is 1.80 times that of the sensor coated with only polyimide film. Within the humidity range of 30%-70%RH, its sensitivity reaches 19.8 pm/%RH and is almost 25 times that of the other lower sensitivity FBG humidity sensor.
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页数：6
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