Investigation on micronanofiber Bragg grating for refractive index sensing》.pdfVIP

Optics Communications 285 (2012) 1128–1133 Contents lists available at SciVerse ScienceDirect Optics Communications journa l homepage: www.el /l oca te/ optcom Investigation on micro/nanofiber Bragg grating for refractive index sensing Ruibing Liang, Qizhen Sun ⁎, Jianghai Wo, Deming Liu a The college of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, P.R. China b National Engineering Laboratory for Next Generation Internet Access System, Wuhan 430074, Hubei, P.R. China a r t i c l e i n f o a b s t r a c t Article history: We propose a refractometric sensor based on micro/nanofiber Bragg grating (MNFBG). The refractive index Received 2 September 2011 (RI) sensing performance dependence on the fiber radius and Bragg grating period of the sensor, as well as Received in revised form 12 November 2011 the temperature cross-sensitive effect, is investigated theoretically. The simulation results demonstrate Accepted 12 November 2011 that 400 nm-radius MNFBG has a linear response to RI ranging from 1.3 to 1.39 with a sensitivity as high Available online 26 November 2011 as 992.7 nm/RIU and half temperature cross-sensitivity of normal FBG. A maximum sensitivity of up to 1200 nm/RIU and an outstanding RI resolution of 8.3×10-6 can be achieved. MNFBG has high potential in var- Keywords: Micro/nanofiber ious types of optic