A relative humidity sensor based on open-cavity Fabry-Perot interferometer by fiber capillary splicing

被引：4
作者：
Lu, Xiao [1 ]
Gong, Huaping [1 ]
Lu, Ye [1 ]
Liu, Yiting [1 ]
Shen, Changyu [1 ]
Zhao, Chunliu [1 ]
机构：
[1] China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China
来源：
OPTICAL FIBER TECHNOLOGY | 2023年 / 77卷
基金：
中国国家自然科学基金;
关键词：
Fabry-Perot; Optical fiber; Humidity Sensor; PVA; REFRACTIVE-INDEX;
D O I：
10.1016/j.yofte.2023.103285
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 relative humidity (RH) sensor based on optical fiber Fabry-Perot interferometer (FPI) with open cavity is proposed and demonstrated, which is manufactured by cutting the fiber capillary (FC) with inclined end and splicing it with the flat end of another FC by overlapping method. Polyvinyl alcohol (PVA) film is coated on the flat end of one FC. The proposed sensor is tested under the conditions of 180 mu m cavity length, 45 mu m hole size and 15 mu m film thickness. The results show that the sensitivity is about 0.70 nm/%RH within the range of 35 % RH 85 %RH. The proposed sensor has the merits of high sensitivity, fast response time, and high stability.
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页数：6
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