Open AccessMethane detection using an interband-cascade LED coupled to a hollow-core fiber
Author(s) -
Nathan Li,
Lei Tao,
Hongming Yi,
Chul Soo Kim,
Mijin Kim,
C. L. Canedy,
Charles D. Merritt,
W. W. Bewley,
I. Vurgaftman,
J. R. Meyer,
M. A. Zondlo
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.415724
Subject(s) - materials science , methane , absorption (acoustics) , cascade , optics , core (optical fiber) , optoelectronics , sensitivity (control systems) , broadband , fiber optic sensor , optical fiber , noise (video) , fiber , electronic engineering , physics , chemistry , computer science , organic chemistry , chromatography , engineering , composite material , image (mathematics) , artificial intelligence
Midwave infrared interband-cascade light-emitting devices (ICLEDs) have the potential to improve the selectivity, stability, and sensitivity of low-cost gas sensors. We demonstrate a broadband direct absorption CH 4 sensor with an ICLED coupled to a plastic hollow-core fiber (1 m length, 1500 µm inner diameter). The sensor achieves a 1σ noise equivalent absorption of approximately 0.2 ppmv CH 4 at 1 Hz, while operating at a low drive power of 0.5 mW. A low-cost sub-ppmv CH 4 sensor would make monitoring emissions more affordable and more accessible for many relevant industries, such as the petroleum, agriculture, and waste industries.