Open AccessSelf-compensated microstructure fiber optic sensor to detect high hydrogen concentration
Author(s) -
ShuiJing Tang,
Bo Zhang,
Zhi Li,
Jixiang Dai,
Gaopeng Wang,
Minghong Yang
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.022826
Subject(s) - materials science , optics , microstructure , optical fiber , repeatability , hydrogen sensor , fiber optic sensor , fiber , photonic crystal fiber , hydrogen , optoelectronics , composite material , palladium , biochemistry , chemistry , physics , organic chemistry , chromatography , catalysis
Dual-cavity microstructure fiber optic hydrogen sensor based on evaporated Pt/WO(3) film was proposed and experimentally explored in this paper, which provides a novel solution to detect high hydrogen concentration (10-30% H(2)). Dual-cavity microstructure fabricated by splicer is composed of an inner air-cavity and a collapsed photonic crystal fiber cavity. The proposed sensor has the advantages of miniature structure, stable configuration, low cost. Based on three-beam interference model and verification experiments, the compensation function to the fluctuation of light source and fiber loss is proved from the theoretical simulation and experimental investigation. The sensor has a short response time (1min), good repeatability and reliability. Besides, the change of temperature affects the response value of the hydrogen sensor, but the impact can be neglected in 10-30% H(2).