Graphene-coated microfiber Bragg grating for high-sensitivity gas sensing

被引：167

作者：

Wu, Yu ^{[1
,3
]}

Yao, Baicheng ^{[1
]}

Zhang, Anqi ^{[1
]}

Rao, Yunjiang ^{[1
]}

Wang, Zegao ^{[2
]}

Cheng, Yang ^{[1
]}

Gong, Yuan ^{[1
]}

Zhang, Weili ^{[1
]}

Chen, Yuanfu ^{[2
]}

Chiang, K. S. ^{[3
]}

机构：

[1] Univ Elect Sci & Technol China, Educ Minist China, Key Lab Opt Fiber Sensing & Commun, Chengdu 610054, Sichuan, Peoples R China

[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

[3] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

来源：

OPTICS LETTERS | 2014年 / 39卷 / 05期

基金：

中国国家自然科学基金;

关键词：

REFRACTIVE-INDEX; FIBER;

D O I：

10.1364/OL.39.001235

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A graphene coated microfiber Bragg grating (GMFBG) for gas sensing is reported in this Letter. Taking advantage of the surface field enhancement and gas absorption of a GMFBG, we demonstrate an ultrasensitive approach to detect the concentration of chemical gas. The obtained sensitivities are 0.2 and 0.5 ppm for NH3 and xylene gas, respectively, which are tens of times higher than that of a GMFBG without graphene for tiny gas concentration change detection. Experimental results indicate that the GMFBG-based NH3 gas sensor has fast response due to its highly compact structure. Such a miniature fiber-optic element may find applications in high sensitivity gas sensing and trace analysis. (C) 2014 Optical Society of America

引用

页码：1235 / 1237

页数：3

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