Graphene-coated microfiber Bragg grating for ammonia gas sensing

Anqi Zhang; Yu Wu; Baicheng Yao; Yuan Gong; Yunjiang Rao

doi:10.1117/12.2073577

11 November 2014 Graphene-coated microfiber Bragg grating for ammonia gas sensing

Anqi Zhang, Yu Wu, Baicheng Yao, Yuan Gong, Yunjiang Rao

Author Affiliations +

Proceedings Volume 9274, Advanced Sensor Systems and Applications VI; 92740G (2014) https://doi.org/10.1117/12.2073577
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

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.

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Anqi Zhang, Yu Wu, Baicheng Yao, Yuan Gong, and Yunjiang Rao "Graphene-coated microfiber Bragg grating for ammonia gas sensing", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740G (11 November 2014); https://doi.org/10.1117/12.2073577

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