Sub-ppm multi gas sensing based on photoacoustic spectroscopy using DFB laser diodes

Sensitive photoacoustic detection of methane (CH4), hydrogen chloride (HCI) and water vapour (H2O) in the near-infrared range using semiconductor DFB lasers is reported. A detection limit of 0.17 ppm of CH4, 0.2 ppm of HCI and 0.024 ppm of H2O (signal-to-noise ratio = 3) is reached using a properly designed photoacoustic cell operating in its first longitudinal mode.


Publié dans:
4. Konferenz über Optische Analysenmesstechnik in Industrie und Umwelt (OPTAM’04), 1863, 189-196
Présenté à:
4. Konferenz über Optische Analysenmesstechnik in Industrie und Umwelt (OPTAM’04), Düsseldorf, Germany, October 7-8, 2004
Année
2004
Publisher:
40001 Düsseldorf, Germany, VDI Verlag GMBH
Laboratoires:


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 Notice créée le 2011-02-04, modifiée le 2020-04-20

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