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Proceedings Article

Optical opacity and reflectivity of plasma produced by irradiation of aluminum thin film by nanosecond pulsed laser

[+] Author Affiliations
M. H. Mahdieh, H. Hosseini Shokoh

Iran Univ. of Science and Technology (Iran, Islamic Republic of)

Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77511P (November 15, 2010); doi:10.1117/12.879403
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From Conference Volume 7751

  • XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
  • Sofia, Bulgaria | August 30, 2010

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.

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Citation

M. H. Mahdieh and H. Hosseini Shokoh
"Optical opacity and reflectivity of plasma produced by irradiation of aluminum thin film by nanosecond pulsed laser", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77511P (November 15, 2010); doi:10.1117/12.879403; http://dx.doi.org/10.1117/12.879403


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