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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 5 — Mar. 1, 2014
  • pp: 1235–1237

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

Yu Wu, Baicheng Yao, Anqi Zhang, Yunjiang Rao, Zegao Wang, Yang Cheng, Yuan Gong, Weili Zhang, Yuanfu Chen, and K. S. Chiang  »View Author Affiliations


Optics Letters, Vol. 39, Issue 5, pp. 1235-1237 (2014)
http://dx.doi.org/10.1364/OL.39.001235


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Abstract

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.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(310.2790) Thin films : Guided waves
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 18, 2013
Revised Manuscript: January 18, 2014
Manuscript Accepted: January 19, 2014
Published: February 24, 2014

Citation
Yu Wu, Baicheng Yao, Anqi Zhang, Yunjiang Rao, Zegao Wang, Yang Cheng, Yuan Gong, Weili Zhang, Yuanfu Chen, and K. S. Chiang, "Graphene-coated microfiber Bragg grating for high-sensitivity gas sensing," Opt. Lett. 39, 1235-1237 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-5-1235


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