Open AccessFiber-enhanced Raman spectroscopy for highly sensitive H2 and SO2 sensing with a hollow-core anti-resonant fiber
Author(s) -
Jianxin Wang,
Weigen Chen,
Pinyi Wang,
Zhixian Zhang,
Fu Wan,
Feng Zhou,
Ruimin Song,
Yingying Wang,
Shoufei Gao
Publication year - 2021
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.437693
Subject(s) - raman spectroscopy , materials science , fiber , optics , raman scattering , core (optical fiber) , optical fiber , fiber optic sensor , spectroscopy , signal (programming language) , analytical chemistry (journal) , chemistry , physics , chromatography , quantum mechanics , computer science , composite material , programming language
An innovative fiber-enhanced Raman gas sensing system with a hollow-core anti-resonant fiber is introduced. Two iris diaphragms are implemented for spatial filtering, and a reflecting mirror is attached to one fiber end that provides a highly improved Raman signal enhancement over 2.9 times than the typical bare fiber system. The analytical performance for multigas compositions is thoroughly demonstrated by recording the Raman spectra of carbon dioxide (CO 2 ), oxygen (O 2 ), nitrogen (N 2 ), hydrogen (H 2 ), and sulfur dioxide (SO 2 ) with limits of detection down to low-ppm levels as well as a long-term instability < 1.05%. The excellent linear relationship between Raman signal intensity (peak height) and gas concentrations indicates a promising potential for accurate quantification.