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conference paper
Sub-ppm multi gas sensing based on photoacoustic spectroscopy using DFB laser diodes
2004
4. Konferenz über Optische Analysenmesstechnik in Industrie und Umwelt (OPTAM’04)
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.
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article_OPTAM_CTI_version_finale.pdf
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