Ultra-highly sensitive hydrogen sensor based on fiber Fabry-Perot interferometer with Pt/WO3 coating

被引：1

作者：

Wang, Yao ^{[1
]}

Yang, Minghong ^{[1
,2
]}

Zhang, Guilin ^{[1
]}

Dai, Jixiang ^{[1
]}

Zhang, Yi ^{[3
]}

Zhuang, Zhi ^{[3
]}

机构：

[1] Wuhan Univ Technol, Natl Engn Lab Fiber Opt Sensing Technol, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, Key Lab Fiber Optic Sensing Technol & Informat Pr, Minist Educ, Wuhan 430070, Peoples R China

[3] Inst Struct Mech, CAEP, Mianyang 621900, Peoples R China

来源：

23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷

关键词：

Fabry-Perot interferometer; optical fiber sensor; hydrogen; Pt/WO3; coating; polymer; FEMTOSECOND LASER; PALLADIUM;

D O I：

10.1117/12.2058845

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A miniaturized fiber tip Fabry-Perot interferometer (FPI) with Pt/WO3 coating was demonstrated as a hydrogen sensor. The air-cavity of FPI was formed by inserting a single mode fiber (SMF) into a partially polymer-filled glass capillary, which was highly sensitive to temperature. A layer of Pt/WO3 was coated on the glass capillary of the FPI serving as a reaction heater upon hydrogen exposure. The heat locally raised the FPI temperature, which led to the wavelength shift of interference spectrum. The average wavelength shift of two interference dips was -20.3 nm upon exposure to similar to 20000 ppm hydrogen concentration. The hydrogen sensitivity of the sensor was estimated to be better than 1 pm/ppm.

引用

页数：4

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