Neutral gas laser: a tool for sensing of atmospheric species by infrared absorption

Joda C. Wormhoudt; Paul L. Kebabian

doi:10.1117/12.181352

27 July 1994 Neutral gas laser: a tool for sensing atmospheric species by infrared absorption

Joda C. Wormhoudt, Paul L. Kebabian

Proceedings Volume 2138, Longer Wavelength Lasers and Applications; (1994) https://doi.org/10.1117/12.181352
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

In the spectroscopic analysis of atmospheric composition, there is a continuing need for stable and reproducible mid-infrared light sources. The neutral rare gas lasers offer several important benefits, in the many cases where one of their lines coincides with an absorption line of an atmospheric species to be observed. As atomic spectral lines, they are not subject to the drift and aging effects seen in diode lasers. Furthermore, the Zeeman effect provides up to a few tenths of a wavenumber of tunability, which can be an advantage over molecular lasers (such as CO₂) which can only be tuned by line selection. We present observations in applications of neutral rare gas lasers to measurements of CO, N₂O and CH₄, and discuss possible applications to a variety of other species, including formaldehyde, methanol, hydrazine, water vapor, and the methyl radical.

Citation Download Citation

Joda C. Wormhoudt and Paul L. Kebabian "Neutral gas laser: a tool for sensing atmospheric species by infrared absorption", Proc. SPIE 2138, Longer Wavelength Lasers and Applications, (27 July 1994); https://doi.org/10.1117/12.181352

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