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Proceedings Paper

Plasma effects during ablation and drilling using pulsed solid-state lasers
Author(s): Detlef Breitling; Andreas Ruf; Peter W. Berger; Friedrich H. Dausinger; Sergei M. Klimentov; Paval A. Pivovarov; Taras V. Kononenko; Vitali I. Konov
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Paper Abstract

Plasma and vapor plumes generated by ultrashort laser pulses have been studied by various optical methods for both single pulse ablation as well as high-repetition rate drilling. Time-resolved shadow and resonance absorption photographs enable to determine the plume and vapor expansion behavior and, by means of an analytical shock wave model, allow to estimate an energy balance that can be refined by plasma transmission measurements. The results furthermore suggest that several types of laser-induced plasmas can be distinguished according to their origin: the material vapor plasma originating at the ablated surface even at moderate intensities, a breakdown plasma at increased power densities occurring in cold vapor or dust particles left from previous ablations during repetitively-pulsed processing and, finally, the optical breakdown in the pure atmosphere at high intensities. The latter also gives rise to nonlinear scattering phenomena resulting in a strong redistribution of the energy density in the beam profile.

Paper Details

Date Published: 2 September 2003
PDF: 10 pages
Proc. SPIE 5121, Laser Processing of Advanced Materials and Laser Microtechnologies, (2 September 2003); doi: 10.1117/12.513766
Show Author Affiliations
Detlef Breitling, Univ. Stuttgart (Germany)
Andreas Ruf, Univ. Stuttgart (Germany)
Peter W. Berger, Univ. Stuttgart (Germany)
Friedrich H. Dausinger, Univ. Stuttgart (Germany)
Sergei M. Klimentov, General Physics Institute (Russia)
Paval A. Pivovarov, General Physics Institute (Russia)
Taras V. Kononenko, General Physics Institute (Russia)
Vitali I. Konov, General Physics Institute (Russia)

Published in SPIE Proceedings Vol. 5121:
Laser Processing of Advanced Materials and Laser Microtechnologies
Friedrich H. Dausinger; Vitali I. Konov; Vladimir Yu. Baranov; Vladislav Ya. Panchenko, Editor(s)

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