Laser diode spectroscopy of the H2O isotopologues in the 2.64 μm region for the in situ monitoring of the Martian atmosphere

A near-infrared diode laser spectrometer was used in the laboratory to measure accurately the molecular parameters of the water vapor isotopologues, H216O, H217O, H218O and HDO, in the 2.64 μm region. The work was made with a new-generation distributed-feedback antimonide-based multi-quantum wells diode laser. The selected spectral range as well as the used laser technology is particularly interesting for the in situ monitoring of the water vapor isotopologues in the lower Martian atmosphere. In the laboratory, it was possible to carefully investigate with one single laser, four lines of H216O, two lines of H218O, one line of H217O and one line of HDO. The corresponding line strengths measurements are reported and thoroughly compared to existing databases. Finally, we discuss the design of a version of the TDLAS laser diode sensor, dedicated to the in situ monitoring of the H2O isotopologues on Mars.

[1]  B. Parvitte,et al.  Line strengths and self-broadening coefficients of carbon dioxide isotopologues (13CO2 and 18O12C16O) near 2.04 μm for the in situ laser sensing of the Martian atmosphere , 2006 .

[2]  Georges Durry,et al.  Open multipass absorption cell for in situ monitoring of stratospheric trace gas with telecommunication laser diodes. , 2002, Applied optics.

[3]  Laurence S. Rothman,et al.  Total internal partition sums for molecules in the terrestrial atmosphere , 2000 .

[4]  Josef Humlíček,et al.  Optimized computation of the voigt and complex probability functions , 1982 .

[5]  V. Krasnopolsky.  On the Deuterium Abundance on Mars and Some Related Problems , 2000 .

[6]  Gang Li,et al.  The HITRAN 2008 molecular spectroscopic database , 2005 .

[7]  O. Korablev,et al.  Diode laser spectroscopy of H2O and CO2 in the 1.877-μm region for the in situ monitoring of the Martian atmosphere , 2006 .

[8]  A spectroscopic study of water vapor isotopologues H216O, H218O and HDO using a continuous wave DFB quantum cascade laser in the 6.7 μm region for atmospheric applications , 2006 .

[9]  G. Mégie,et al.  Shot-noise-limited dual-beam detector for atmospheric trace-gas monitoring with near-infrared diode lasers. , 2000, Applied optics.

[10]  G. Mégie,et al.  Atmospheric CH4 and H2O monitoring with near-infrared InGaAs laser diodes by the SDLA, a balloonborne spectrometer for tropospheric and stratospheric in situ measurements. , 1999, Applied optics.

[11]  B. Parvitte,et al.  Laboratory spectroscopic calibration of infrared tunable laser spectrometers for the in situ sensing of the Earth and Martian atmospheres , 2006 .

[12]  O. Korablev,et al.  TDLAS a laser diode sensor for the in situ monitoring of H2O, CO2 and their isotopes in the Martian atmosphere , 2006 .