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Proceedings Paper

Characterization of near-infrared low energy ultra-short laser pulses for portable applications of laser induced breakdown spectroscopy
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Paper Abstract

We report on the delivery of low energy ultra-short (<1 ps) laser pulses for laser induced breakdown spectroscopy (LIBS). Ultra-short pulses have the advantage of high peak irradiance even at very low pulse energies. This opens the possibility to use compact, rare-earth doped fiber lasers in a portable platform for point detection applications using LIBS for elemental analysis. The use of low energy ultra-short pulses minimizes the generation of a broad continuum background in the emission spectrum, which permits the use of non-gated detection schemes using very simple and compact spectrometers rather than large and delicate intensified charge-coupled devices (ICCDs). The pulse energies used to produce high-quality LIBS spectra in this investigation are some of the lowest reported and we investigate the threshold pulse requirements for a number of near IR pulse wavelengths (785-1500 nm) and observe that the pulse wavelength has no effects on the threshold for observation of plasma emission or the quality of the emission spectra obtained.

Paper Details

Date Published: 4 April 2008
PDF: 11 pages
Proc. SPIE 6954, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing IX, 695408 (4 April 2008); doi: 10.1117/12.781556
Show Author Affiliations
Paul M. Pellegrino, U.S. Army Research Lab. (United States)
Alexander W. Schill, U.S. Army Research Lab. (United States)
Dimitra N. Stratis-Cullum, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 6954:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing IX
Augustus Way Fountain III; Patrick J. Gardner, Editor(s)

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