Title :
Fiber-Optic Acetylene Gas Sensor Based on Microstructured Optical Fiber Bragg Gratings
Author :
Yan, Guofeng ; Zhang, A. Ping ; Ma, Guiying ; Wang, Binhao ; Kim, Bongkyun ; Im, Jooeun ; He, Sailing ; Chung, Youngjoo
Author_Institution :
State Key Lab. of Modern Opt. Intrumentation, Zhejiang Univ., Hangzhou, China
Abstract :
A fiber-optic acetylene gas sensor based on a microstructured optical fiber Bragg grating (MOFBG) is presented. The microstructured optical fiber (MOF) is specially designed to have a photosensitive core and holey cladding for grating fabrication and gas detection. The micro-holes of the MOF serve as gas cells, in which the acetylene molecules interact with light through the evanescent-waves of guided modes. The MOFBG with a specific period is utilized to not only make the sensor work in reflection mode, but also selectively determine the wavelength and the order of the acting fiber mode for gas sensing. The MOF is prepared by using the well-known stack-and-draw method, and the Bragg gratings are fabricated by using 193-nm laser pulses. Experiments for the use of the MOFBG for acetylene gas detection have been successfully demonstrated.
Keywords :
diffraction gratings; fibre optic sensors; gas sensors; holey fibres; optical fibre cladding; organic compounds; MOFBG; acetylene gas detection; acetylene molecules; evanescent-waves; fiber mode; fiber-optic acetylene gas sensor; gas cells; gas sensing; grating fabrication; guided modes; holey cladding; microholes; microstructured optical fiber Bragg gratings; photosensitive core; reflection mode; stack-and-draw method; wavelength 193 nm; Absorption; Fiber gratings; Optical fiber sensors; Optical fibers; Reflection; Evanescent-wave absorption; fiber Bragg gratings (FBGs); microstructured optical fiber (MOF); optical fiber gas sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2164575
