Abstract

A study of a sensor for hydrogen (${\mathrm{H}}_2$) detection based on fiber Bragg gratings coated with palladium (Pd) with self-temperature compensation is presented. The cladding around the gratings was reduced down to 50 μm diameter by a chemical etching process. One of the gratings was left uncoated, and the other was coated with 150 nm of Pd. It was observed that palladium hydride has unstable behavior in environments with high humidity level. A simple solution to overcome this problem based on a Teflon tape is presented. The sensing device studied was able to respond to ${\mathrm{H}}_2$ concentrations in the range 0%–1% v/v at room temperature and atmospheric pressure, achieving sensitivities larger than 20 pm/% v/v. Considering ${\mathrm{H}}_2$ concentrations in nitrogen up to 1%, the performance of the sensing head was characterized for different thicknesses of Pd coating ranging from 50 to 200 nm.

© 2015 Optical Society of America

Surface plasmon resonance-based fiber-optic hydrogen gas sensor utilizing palladium supported zinc oxide multilayers and their nanocomposite

Rana Tabassum and Banshi D. Gupta
Appl. Opt. 54(5) 1032-1040 (2015)

Micro-structured femtosecond laser assisted FBG hydrogen sensor

Joseph Muna Karanja, Yutang Dai, Xian Zhou, Bin Liu, and Minghong Yang
Opt. Express 23(24) 31034-31042 (2015)

Microstructured FBG hydrogen sensor based on Pt-loaded WO₃

Xian Zhou, Yutang Dai, Joseph Muna Karanja, Fufei Liu, and Minghong Yang
Opt. Express 25(8) 8777-8786 (2017)

Quick response hydrogen LSPR sensor based on a hetero-core fiber structure with palladium nanoparticles

Masahiro Mikami, Daisuke Komatsu, Ai Hosoki, Michiko Nishiyama, Hirotaka Igawa, Atsushi Seki, Shoichi Kubodera, and Kazuhiro Watanabe
Opt. Express 29(1) 48-58 (2021)

Side-polished fiber Bragg grating hydrogen sensor with WO₃-Pd composite film as sensing materials

Jixiang Dai, Minghong Yang, Yun Chen, Kun Cao, Hansheng Liao, and Pengcheng Zhang
Opt. Express 19(7) 6141-6148 (2011)