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Proceedings Paper

Visualization of transient phenomena during the interaction of pulsed CO2 laser radiation with matter
Author(s): R. Schmitt; Manfred Hugenschmidt
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Paper Abstract

Carbon-dioxide-lasers operating in the pulsed mode with energy densities up to several tens of J/cm2 and peak power densities in the multi-MW/cm2-range may cause fast heating and melting. Eventually quasi-explosive ejection, decomposition or vaporization of material can be observed. Surface plasmas are strongly influencing the energy transfer from the laser radiation field to any target. For optically transparent plastics, such as PMMA for example, only slowly expanding plasmas (LSC-waves) are ignited at fluences around 20 J/cm2, with a low level of self-luminosity. High brightness, supersonically expanding plasma jets (LSD-waves) are generated at the same fluences on glasses. Similar conditions were found for metals as well. From recordings with a high speed CCD-camera, interesting features concerning the initial plasma phases and temporal evolution were deduced. Additionally, information was obtained concerning the quasi explosive ejection of material for PMMA.

Paper Details

Date Published: 6 May 1996
PDF: 7 pages
Proc. SPIE 2796, ICONO '95: Fundamentals of Laser-Matter Interaction, (6 May 1996); doi: 10.1117/12.239754
Show Author Affiliations
R. Schmitt, German-French Research Institute Saint-Louis (France)
Manfred Hugenschmidt, German-French Research Institute Saint-Louis (France)


Published in SPIE Proceedings Vol. 2796:
ICONO '95: Fundamentals of Laser-Matter Interaction
Konstantin N. Drabovich; Nikolai I. Koroteev, Editor(s)

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