Title :
Methane and carbon dioxide sensing using a DFB laser diode operating at 1.64 mu m
Author :
Weldon, V. ; Phelan, P. ; Hegarty, J.
Author_Institution :
Trinity Coll., Dublin, Ireland
fDate :
3/18/1993 12:00:00 AM
Abstract :
Selective gas sensing of CH4 and CO2 using a single tunable 1.64 mu m 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, one can detect both using absorption spectroscopy.
Keywords :
carbon compounds; distributed feedback lasers; gas sensors; infrared spectra of organic molecules and substances; infrared spectra of polyatomic inorganic molecules; infrared spectroscopy; laser tuning; measurement by laser beam; organic compounds; semiconductor lasers; 1.64 micron; CH 4; CO 2; DFB laser diode; absorption spectroscopy; gas sensing; methane; noncoincident absorptions; overlapping spectral region; semiconductor lasers; wavelength tuning;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930374
