Conference paper

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.


    • EPFL-CONF-163065

    Record created on 2011-02-04, modified on 2017-05-10

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