Reflective-Type High Sensitivity Optical Fiber Hydrogen Sensor Based On Enlarged Taper Cascaded With Tilted Fiber Grating

被引：13

作者：

Shen, Changyu ^{[1
]}

Huang, Zhenlin ^{[1
]}

Chen, Xiaoman ^{[1
]}

Chen, Hongchen ^{[1
]}

Wang, Zhihao ^{[1
]}

Li, Yi ^{[1
]}

Liu, Jiaxiang ^{[1
]}

Zhou, Jinglan ^{[1
]}

机构：

[1] China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2022年 / 40卷 / 18期

基金：

中国国家自然科学基金;

关键词：

Au-Pd nanofilm; enlarged taper; hydrogen sensing; tilted fiber Bragg grating; INTERFEROMETER; NANOPARTICLES;

D O I：

10.1109/JLT.2022.3192058

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：

Highly sensitive reflective-type fiber hydrogen sensor based on an enlarged taper cascaded with a tilted fiber grating (TFBG) was proposed. Hydrogen-sensitive Au-Pd nanofilm was coated on the TFBG surface by magnetron sputtering means. By cascading an enlarged taper upstream to the TFBG, cladding modes and Ghost mode of the TFBG could he coupled into the core to form a reflective-type TFBG-based hydrogen sensor. As the hydrogen was absorbed by the Au-Pd nanofilm, the effective refractive index of the cladding of the TFBG will change accordingly, so as to the reflective spectra of the TFBG. The hydrogen concentration was obtained through the intensity changing of the ghost mode in the reflective spectra of TFBG. The proposed sensor showed a high sensitivity of 4.83 dB/% with a calculated LOD of 0.07% for the hydrogen concentration range from 0% to 0.7% at room temperature with the rapid response time of 26 s and recovery time of 40 s, respectively.

引用

页码：6296 / 6302

页数：7

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