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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 68, Iss. 5 — May. 1, 2014
  • pp: 517–524

Ultraviolet Absorption Spectroscopy in Optically Dense Fireballs Using Broadband Second-Harmonic Generation of a Pulsed Modeless Dye Laser

Michael Soo and Nick Glumac

Applied Spectroscopy, Vol. 68, Issue 5, pp. 517-524 (2014)


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Abstract

Broadband frequency doubling of a modeless dye laser pulse is used to enable single-shot absorption spectroscopy in the ultraviolet for optically dense, energetic-materials fireball applications. Band widths of approximately 1-3 nm are generated in the 226 and 268 nm regions using a doubling crystal. Strong focusing of the fundamental beam onto the crystal is found to be sufficient to achieve 1-5% conversion efficiency with a pulse intensity sufficient to saturate the array detector even after 75% attenuation through the fireball. The technique is demonstrated with nitric oxide (NO) absorption in a gas cell and is then used to perform the first detection and temperature fitting of aluminum monofluoride (AlF) and magnesium monofluoride (MgF) in a fireball environment.

Citation
Michael Soo and Nick Glumac, "Ultraviolet Absorption Spectroscopy in Optically Dense Fireballs Using Broadband Second-Harmonic Generation of a Pulsed Modeless Dye Laser," Appl. Spectrosc. 68, 517-524 (2014)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-68-5-517

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