Application of InAsSb/InAsSbP and lead chalcogenide infrared diode lasers for photoacoustic detection in the 3.2 and 5 μm region

An investigation of photoacoustic detection using 3.2–3.6 and 5 μm diode lasers is described. An inexpensive resonant photoacoustic system was developed based, on a simple glass cell and condenser and electret microphone (Brüel & Kjaer type 4144/Sennheiser type K6P). The system was tested on the...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2003-11, Vol.59 (13), p.3063-3074
Main Authors: Kania, P., Civiš, S.
Format: Article
Language:English
Subjects:
Infrared absorption
Infrared diode lasers
Photoacoustic gas detection
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Summary:An investigation of photoacoustic detection using 3.2–3.6 and 5 μm diode lasers is described. An inexpensive resonant photoacoustic system was developed based, on a simple glass cell and condenser and electret microphone (Brüel & Kjaer type 4144/Sennheiser type K6P). The system was tested on the single rotation–vibration lines of C 2H 2, CO, COS, and NH 3 gases. The best detection limits obtained are 300 ppm V for C 2H 2 and 20 ppm V for COS. Potential applications of infrared diode laser photoacoustic detection lie in the areas of analytical chemistry, atmospheric research, and investigation of the kinetics of reactive species.
ISSN:1386-1425
DOI:10.1016/S1386-1425(03)00110-0