期刊
APPLIED SPECTROSCOPY
卷 68, 期 5, 页码 517-524出版社
SAGE PUBLICATIONS INC
DOI: 10.1366/13-07276
关键词
UV spectroscopy; Ultraviolet spectroscopy; Modeless laser; Combustion; Fireball; Metal-fluorocarbon; Absorption
资金
- Defense Threat Reduction Agency
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.
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