Off-beam quartz-enhanced photoacoustic spectroscopy-based sensor for hydrogen sulfide trace gas detection using a mode-hop-free external cavity quantum cascade laser

Hydrogen sulfide (H 2 S) trace gas detection based on off-beam quartz-enhanced photoacoustic spectroscopy using a continuous wave (CW), mode-hop-free external cavity (EC) quantum cascade laser tunable from 1310 to 1210 cm −1 was performed. A 1 σ minimum detection limit of 492 parts per billion by vo...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2017-05, Vol.123 (5), p.1-8, Article 141
Main Authors: Helman, Marek, Moser, Harald, Dudkowiak, Alina, Lendl, Bernhard
Format: Article
Language:English
Subjects:
Absorptivity
Applied physics
Continuous radiation
Engineering
Hydrogen sulfide
Lasers
Optical Devices
Optics
Photoacoustic spectroscopy
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum cascade lasers
Quantum Optics
Quartz
Spectrum analysis
Time constant
Trace gases
Tunable lasers
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Summary:Hydrogen sulfide (H 2 S) trace gas detection based on off-beam quartz-enhanced photoacoustic spectroscopy using a continuous wave (CW), mode-hop-free external cavity (EC) quantum cascade laser tunable from 1310 to 1210 cm −1 was performed. A 1 σ minimum detection limit of 492 parts per billion by volume (ppbv) using a 1 s lock-in time constant was obtained by targeting the line centered at 1234.58 cm −1 . This value corresponds to a normalized noise equivalent absorption coefficient for H 2 S of 3.05 × 10 −9  W cm −1  Hz −1/2 .
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-017-6717-8