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Wavelength modulated cavity enhanced absorption spectroscopy of ammonia at 1994 nm

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Abstract

We describe the sensitive detection of ammonia by wavelength modulated cavity enhanced infrared tunable diode laser absorption spectroscopy at 1994 nm. The spectrometer can measure a fractional absorption of ∼10-5 for an absorption pathlength of a few kilometers. The spectral resolution and sensitivity are sufficient to measure ammonia isotopomers (14NH3, 15NH3) in planetary atmospheres. The spectrometer is miniaturisable, so a future multiple-species version will be highly suitable for in situ planetary exploration and life-detection.

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Authors and Affiliations

  1. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA

    R. Vasudev

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  1. R. Vasudev
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Correspondence to R. Vasudev.

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PACS

42.62.Fi; 33.20.-t; 33.20.Ea

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Vasudev, R. Wavelength modulated cavity enhanced absorption spectroscopy of ammonia at 1994 nm. Appl. Phys. B 87, 163–167 (2007). https://doi.org/10.1007/s00340-006-2486-5

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  • DOI: https://doi.org/10.1007/s00340-006-2486-5

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