Visualization of transient phenomena during the interaction of pulsed CO2 laser radiation with matter

R. Schmitt; Manfred Hugenschmidt

doi:10.1117/12.239754

6 May 1996 Visualization of transient phenomena during the interaction of pulsed CO₂ laser radiation with matter

R. Schmitt, Manfred Hugenschmidt

Proceedings Volume 2796, ICONO '95: Fundamentals of Laser-Matter Interaction; (1996) https://doi.org/10.1117/12.239754
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

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.

Citation Download Citation

R. Schmitt and Manfred Hugenschmidt "Visualization of transient phenomena during the interaction of pulsed CO₂ laser radiation with matter", Proc. SPIE 2796, ICONO '95: Fundamentals of Laser-Matter Interaction, (6 May 1996); https://doi.org/10.1117/12.239754

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