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

Paul M. Pellegrino; Alexander W. Schill; Dimitra N. Stratis-Cullum

doi:10.1117/12.781556

4 April 2008 Characterization of near-infrared low energy ultra-short laser pulses for portable applications of laser induced breakdown spectroscopy

Paul M. Pellegrino, Alexander W. Schill, Dimitra N. Stratis-Cullum

Author Affiliations +

Proceedings Volume 6954, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing IX; 695408 (2008) https://doi.org/10.1117/12.781556
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

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.

Citation Download Citation

Paul M. Pellegrino, Alexander W. Schill, and Dimitra N. Stratis-Cullum "Characterization of near-infrared low energy ultra-short laser pulses for portable applications of laser induced breakdown spectroscopy", Proc. SPIE 6954, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing IX, 695408 (4 April 2008); https://doi.org/10.1117/12.781556

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