Spectroscopic gas analyzers based on indium-phosphide, antimonide and lead-salt diode-lasers

Currently available semiconductor lasers for spectroscopy in the near- and mid-infrared region based on direct band-to-band transitions as gallium-arsenide, indium-phosphide, antimonides and lead-salt containing compounds will be discussed together with the main features of different tunable diode-l...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2002-09, Vol.58 (11), p.2361-2372
Main Authors: Werle, P, Maurer, K, Kormann, R, Mücke, R, D'Amato, F, Lancia, T, Popov, A
Format: Article
Language:English
Subjects:
Antimony - chemistry
Carbon dioxide
Formaldehyde
Gas analysis
Indium - chemistry
IR-spectroscopy
Lead - chemistry
Methane
Phosphines - chemistry
Semiconductor laser
Spectrophotometry, Infrared - instrumentation
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Summary:Currently available semiconductor lasers for spectroscopy in the near- and mid-infrared region based on direct band-to-band transitions as gallium-arsenide, indium-phosphide, antimonides and lead-salt containing compounds will be discussed together with the main features of different tunable diode-laser absorption spectrometers for trace gas analysis. Measurements of atmospheric carbon dioxide with a room-temperature 2 μm indium-phosphide laser, applications of antimonide lasers for methane and formaldehyde sensing in the 3–4 μm range and a fast chemical sensor for methane flux measurements based on lead-salt diode-lasers operating near 7.8 μm will be presented.
ISSN:1386-1425
DOI:10.1016/S1386-1425(02)00051-3