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Proceedings Paper

Eye-safe infrared laser-induced breakdown spectroscopy (LIBS) emissions from energetic materials
Author(s): Ei E. Brown; Uwe Hömmerich; Clayton C. Yang; Feng Jin; Sudhir B. Trivedi; Alan C. Samuels
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Paper Abstract

Laser-induced breakdown spectroscopy is a powerful diagnostic tool for detection of trace elements by monitoring the atomic and ionic emission from laser-induced plasmas. Besides elemental emissions from conventional UV-Vis LIBS, molecular LIBS emission signatures of the target compounds were observed in the long-wave infrared (LWIR) region in recent studies. Most current LIBS studies employ the fundamental Nd:YAG laser output at 1.064 μm, which has extremely low eye-damage threshold. In this work, comparative LWIR-LIBS emissions studies using traditional 1.064 μm pumping and eye-safe laser wavelength at 1.574 μm were performed on several energetic materials for applications in chemical, biological, and explosive (CBE) sensing. A Q-switched Nd: YAG laser operating at 1.064 μm and the 1.574 μm output of a pulsed Nd:YAG pumped Optical Parametric Oscillator were employed as the excitation sources. The investigated energetic materials were studied for the appearance of LWIR-LIBS emissions (4-12 μm) that are directly indicative of oxygenated breakdown products as well as partially dissociated and recombination molecular species. The observed molecular IR LIBS emission bands showed strong correlation with FTIR absorption spectra of the studied materials for 1.064 μm and 1.574 μm pump wavelengths.

Paper Details

Date Published: 13 May 2016
PDF: 7 pages
Proc. SPIE 9824, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII, 98241B (13 May 2016); doi: 10.1117/12.2225231
Show Author Affiliations
Ei E. Brown, Hampton Univ. (United States)
Uwe Hömmerich, Hampton Univ. (United States)
Clayton C. Yang, Battelle Eastern Science and Technology Ctr. (United States)
Feng Jin, Brimrose Corp. of America (United States)
Sudhir B. Trivedi, Brimrose Corp. of America (United States)
Alan C. Samuels, U.S. Army Edgewood Chemical Biological Ctr. (United States)

Published in SPIE Proceedings Vol. 9824:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII
Augustus Way Fountain III, Editor(s)

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