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Proceedings Paper

Optical opacity and reflectivity of plasma produced by irradiation of aluminum thin film by nanosecond pulsed laser
Author(s): M. H. Mahdieh; H. Hosseini Shokoh
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Paper Abstract

The dynamics of an aluminum plasma plume expanding in atmosphere air was studied experimentally. The plasma was produced by irradiating a thin film aluminum with a single pulse laser beam in ambient air. The laser pulse was provided by second harmonic of a Q-switched Nd:YAG laser with ~10 nsec pulse duration and ~ 50 mJ energy per pulse. A low power CW He-Ne laser beam was also used for probing the plasma. Both transmission and reflection of the probe were monitored temporally during the ablation time scale. For transmission three temporal stages can be distinguished and there is a substantial reduction in the reflection coefficient when laser ablation occurs.

Paper Details

Date Published: 15 November 2010
PDF: 7 pages
Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77511P (15 November 2010); doi: 10.1117/12.879403
Show Author Affiliations
M. H. Mahdieh, Iran Univ. of Science and Technology (Iran, Islamic Republic of)
H. Hosseini Shokoh, Iran Univ. of Science and Technology (Iran, Islamic Republic of)


Published in SPIE Proceedings Vol. 7751:
XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Tanja Dreischuh; Petar A. Atanasov; Nikola V. Sabotinov, Editor(s)

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