Near-infrared trace-gas sensors based on room-temperature diode lasers |
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| Authors: | P Werle R Mücke F D´Amato T Lancia |
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| Institution: | (1) Fraunhofer-Institute for Atmospheric Environmental Research, D-82467 Garmisch-Partenkirchen, Germany (Fax: +49-8821/73573, E-mail: Werle@ifu.fhg.de), DE;(2) Ente per le Nuove tecnologie, l′Energia e l′Ambiente (ENEA), Frascati (Roma), Italy, IT;(3) Tecsa Ricerca & Innovazione srl (TRI), Scanzorosciate (BG), Italy, IT |
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| Abstract: | 2 monitor designed for field applications using room-temperature diode lasers are presented. Near-infrared DFB lasers operating
at 1.57 μm and around 2.0 μm have been used for CO2 measurements. At ambient concentration levels a resolution of more than two orders of magnitude has been demonstrated at
1.57 μm, at 2 μm the precision is in the order of 0.1 ppm CO2, and for trace analysis a detection limit of 10 ppb has been obtained. The measurements demonstrate the capability of near-infrared
DFB diode lasers for the precise determination of CO2 concentrations as required for climatological, medical, or industrial applications.
Received: 24 February 1998/Revised version: 27 April 1998 |
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| Keywords: | PACS: 07 65 07 88 +y 42 60 -v 42 55 Px |
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