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 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 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
Full Article | PDF ArticleMore Like This
B. C. Yao, Y. Wu, A. Q. Zhang, Y. J. Rao, Z. G. Wang, Y. Cheng, Y. Gong, W. L. Zhang, Y. F. Chen, and K. S. Chiang
Opt. Express 22(23) 28154-28162 (2014)
Y. Wu, B. C. Yao, A. Q. Zhang, X. L. Cao, Z. G. Wang, Y. J. Rao, Y. Gong, W. Zhang, Y. F. Chen, and K. S. Chiang
Opt. Lett. 39(20) 6030-6033 (2014)
Cai-Bin Yu, Yu Wu, Xiao-Lei Liu, Bai-Cheng Yao, Fei Fu, Yuan Gong, Yun-Jiang Rao, and Yuan-Fu Chen
Opt. Mater. Express 6(3) 727-733 (2016)