Miniature Hydrogen Sensor Based on Fiber Inner Cavity and Pt-doped WO3 Coating

被引：11

作者：

Hu, Tian Yi ^{[1
]}

Wang, D. N. ^{[1
,2
,3
,4
]}

Wang, Min

Li, Zhi ^{[4
]}

Yang, Minghong ^{[4
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China

[2] Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China

[3] China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou, Zhejiang, Peoples R China

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

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Hydrogen sensor; fiber sensor; femtosecond laser; MACH-ZEHNDER INTERFEROMETER; FILM; PALLADIUM; GRATINGS; LAYERS; AIR;

D O I：

10.1109/LPT.2014.2327013

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：

We demonstrate a miniaturized fiber device based on fiber inner air-cavity with periodical microstructures and platinum (Pt)-doped WO3 coating for hydrogen concentration sensing. The fiber inner air-cavity is formed by use of femtosecond laser micromachining together with fusion splicing technique and the line shape microstructures are inscribed by femtosecond laser beam scanning. The Pt-doped WO3 coating on the fiber surface near the cavity leads to the device sensitivity to hydrogen concentration, and the maximum wavelength shift obtained is similar to 2.64 nm when the hydrogen concentration is increased from 0% to 4% in volume percentage. The system is highly sensitive and miniature and exhibits a low temperature cross-sensitivity.

引用

页码：1458 / 1461

页数：4

共 14 条

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