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Laser induced breakdown spectroscopy: Challenges and Future

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Publisher’s version / Version de l'éditeur:

CAP Congress (Canadian Association of Physicists), 2011-06-15

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Laser induced breakdown spectroscopy: Challenges and Future

Sabsabi, M.; Doucet, F. R.; Bouchard, P.; Héon, R.; Hamel, A.; Laville, S.;

Gravel, J. F.

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Invited lecture to CAP2011

Laser induced breakdown spectroscopy: Challenges and

Future

M. Sabsabi, F. R. Doucet, P. Bouchard, R. Héon, A. Hamel, S. Laville, and J.F Gravel.

National Research Council Canada (NRC), Industrial Materials Institute (IMI), Boucherville (QC), J4B 6Y4, Canada

Laser-Induced Breakdown Spectroscopy (LIBS) is a method of optical emission spectroscopy that uses laser-generated plasma as the source of vaporization, atomization and excitation. LIBS is being used as an analytical method by a growing number of research groups. Although the LIBS method has been in existence for more than 40 years, prior to 1980, interest in the technology centered mainly on the basics of plasma formation. A few instruments based on LIBS have been developed but have not found widespread use. In the last decade, there has been a renewed interest in the method for a wide range of applications. This is due to the unveiling of significant technological developments in the components (lasers, spectrometers, detectors) used in LIBS instruments as well as emerging needs to perform real time measurements under conditions to which conventional techniques cannot be applied.

Recently, fiber lasers have become one of the hottest topics in photonics. In this presentation we will report their use for LIBS analysis and will discuss their advantages and inconvenient in terms of sensitivity, standoff, reproducibility, ablation, energy delivery, etc. Also, we will give an overview about LIBS applications for on-line measurements such as molten materials, metal ore processing, effluents, slurries, liquids, LIBS for nuclear industry, pharmaceutics etc. In addition, we will present some approaches to improve the LIBS sensitivity developed in our laboratory and elsewhere such as double pulse mode, laser induced fluorescence coupled to LIBS, resonance enhanced LIBS, resonant ablation etc.

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