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Proceedings Paper

Graphene-coated microfiber Bragg grating for ammonia gas sensing
Author(s): Anqi Zhang; Yu Wu; Baicheng Yao; Yuan Gong; Yunjiang Rao
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Paper Abstract

The excitation of surface field and evanescent enhancement in the graphene based optical waveguide have shown sensitive to the refractive index of surrounding media and potential applications in high-sensitivity biochemical sensing. In this paper, we investigate the graphene-coated microfiber Bragg gratings (GMFBGs) with different diameters for ammonia gas sensing. The maximum sensitivity with 6 pm/ppm is achieved experimentally when the microfiber’s diameter is ~10 μm. Moreover, by adjusting the diameter of the GMFBG, the sensing performance of the GMFBGs can be optimized. Experimental results indicate, when the diameter is range of 8~12 μm, the GMFBG shows the characteristics of high sensitivity, relative low attenuation, and large dynamic range.

Paper Details

Date Published: 11 November 2014
PDF: 7 pages
Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740G (11 November 2014); doi: 10.1117/12.2073577
Show Author Affiliations
Anqi Zhang, Univ. of Electronic Science and Technology of China (China)
Yu Wu, Univ. of Electronic Science and Technology of China (China)
Baicheng Yao, Univ. of Electronic Science and Technology of China (China)
Yuan Gong, Univ. of Electronic Science and Technology of China (China)
Yunjiang Rao, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 9274:
Advanced Sensor Systems and Applications VI
Tiegen Liu; Shibin Jiang; Niels Neumann, Editor(s)

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