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Proceedings Paper

Laser detection of the parameters of small solid particles located in air
Author(s): Alexander A. Andreev; Toshitsugu Ueda; Muneaki Wakamatsu; Anatoly Golub
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Paper Abstract

The problem of small particle size and material detection is important for industrial and environmental applications. Previous investigations have shown the possibility of using the laser breakdown method to achieve first goal; the sensitivity of this method is a thousand times higher than that of conventional methods. However, for small particle sizes, the damage threshold of the solid target in this case is very close to the breakdown point of pure air. After breakdown, there is a small volume of dense hot plasma that emits radiation. We analyzed this radiation especially at late stage using an analytical model and simulation code as well as by experiment, and found that the emission intensity varied depending on the laser type and plasma parameters including initial particle size.

Paper Details

Date Published: 23 March 2001
PDF: 10 pages
Proc. SPIE 4350, Laser Optics 2000: Solid State Lasers, (23 March 2001); doi: 10.1117/12.420962
Show Author Affiliations
Alexander A. Andreev, Yokogawa Electric Corp. and Institute of Laser Physics (Japan)
Toshitsugu Ueda, Yokogawa Electric Corp. (Japan)
Muneaki Wakamatsu, Yokogawa Electric Corp. (Japan)
Anatoly Golub, Institute of Laser Physics (Russia)

Published in SPIE Proceedings Vol. 4350:
Laser Optics 2000: Solid State Lasers
Vladimir I. Ustugov, Editor(s)

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