U-shaped microfiber coupler coated with polyvinyl alcohol film for highly sensitive humidity detection

被引：22
作者：
Zhao, Yong [1 ,2 ]
Peng, Yun [1 ]
Chen, Mao-qing [1 ]
Xia, Feng [1 ]
Tong, Rui-Jie [1 ]
机构：
[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
[2] State Key Lab Synthet Automat Proc Ind, Shenyang 110819, Liaoning, Peoples R China
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2019年 / 285卷 / 628-636期
基金：
中国国家自然科学基金;
关键词：
U-shaped microfiber coupler; Humidity detection; Highly sensitive; PVA film; Temperature insensitive; POLYMER OPTICAL-FIBER; RELATIVE-HUMIDITY; HIGH-TEMPERATURE; LOOP RESONATOR; SENSOR;
D O I：
10.1016/j.sna.2018.12.005
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 probe-type relative humidity (RH) sensor was proposed and developed by combination of a U-shaped microfiber coupler (MFC) and a polyvinyl alcohol coating. Optical MFC is considered as an excellent kind of humidity sensor due to its highly sensitive to the environmental RI changes. By covering one layer of PVA film onto the surface of the waist region of the MFC, the sensitive of the proposed sensor was further increased. Experiment results indicated that the proposed sensor exhibited a good linear relationship between the wavelength and relative humidity over the 15%-85%RH range and which also exhibited sensitivity are about 318.1 pm/%RH. And temperature experiment results showed that the temperature sensitivity of the proposed sensor is about 13.9 pm/degrees C over the 20 degrees C to 50 degrees C rang, which indicated that the proposed sensor has the performance of being low temperature sensitive. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：628 / 636
页数：9
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