Methane and carbon dioxide sensing using a DFB laser diode operating at 1.64 μm

18 March 1993

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 29 (6) , 560-561
https://doi.org/10.1049/el:19930374

Abstract

Selective gas sensing of CH₄ and CO₂ using a single tunable 1.64 μm DFB laser diode is demonstrated for the first time. By precise wavelength tuning of the diode to non-coincident absorptions of the two gases in their overlapping spectral region we can detect both using absorption spectroscopy.

Keywords

ABSORPTION SPECTROSCOPY
GAS SENSING
1.64 MICRON
METHANE
NONCOINCIDENT ABSORPTIONS
CH4
OVERLAPPING SPECTRAL REGION
SEMICONDUCTOR LASERS
CO2
DFB LASER DIODE
WAVELENGTH TUNING

This publication has 1 reference indexed in Scilit:

Measurements of cross-sensitivity to contaminant gases using a highly selective, optical-fiber-remoted methane sensor based on correlation spectroscopy
Published by SPIE-Intl Soc Optical Eng ,1992