Diode laser spectroscopy of H2O and CO2 in the 1.877-μm region for the in situ monitoring of the Martian atmosphere |
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| Authors: | T Le Barbu B Parvitte V Zéninari I Vinogradov O Korablev G Durry |
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| Institution: | (1) Groupe de Spectrométrie Moléculaire et Atmosphérique, UMR CNRS 6089, UFR Sciences Exactes et Naturelles, Moulin de la Housse, 1039, 51687 Reims, Cedex 2, France;(2) Institut Pierre Simon Laplace (IPSL), Service d’Aéronomie, UMR 7620, CNRS-Réduit de Verrières, 3, 91371 Verrières-le-Buisson Cedex, France;(3) Space Research Institute (IKI), 84/32 Profsoyuznaya, 117997 Moscow, Russia |
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| Abstract: | A diode laser spectrometer was used in the laboratory to study H2O and CO2 line intensities and self-broadening coefficients around 1.877 μm. The spectral region ranging from 5327 cm-1 to 5329 cm-1, which is suitable for the in situ sensing of water vapor and carbon dioxide in the Martian atmosphere, was studied using
a distributed feedback GaInSb diode laser from Nanoplus GmbH. We have studied one line from the (011)←(000)band of H2O and two lines from the (0112)I←(000) band of CO2. The results of intensity and self-broadening measurements are compared to available databases, ab initio calculations and
previous experimental determinations. Finally, we discuss the current development of the tunable diode laser absorption spectrometer
instrument, a laser diode sensor devoted to the in situ measurement of H2O and CO2 in the Martian atmosphere.
PACS 07.57.Ty; 07.87.+v |
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