Dynamic behavior of the laser beam cutting and welding process due to instabilities of industrial high-power CO2 lasers

Ingo Decker; Holger Heyn; Helmut Wohlfahrt

doi:10.1117/12.167596

1 February 1994 Dynamic behavior of the laser beam cutting and welding process due to instabilities of industrial high-power CO₂ lasers

Ingo Decker, Holger Heyn, Helmut Wohlfahrt

Author Affiliations +

Proceedings Volume 2062, Lasers as Tools for Manufacturing; (1994) https://doi.org/10.1117/12.167596
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

The temporal beam power fluctuations of a high-power CO₂ laser are analyzed according to their frequency spectrum and its time dependent variation. Simultaneously to the laser beam diagnostic, signals obtained from the light emission during the cutting and welding process have been detected. By comparison of corresponding spectra the interaction between beam oscillations and process dynamics is studied. The influence on the surface structure of the processed material is discussed especially in the case of laser beam cutting. For this the spatial surface morphology is also analyzed by means of local fast Fourier transformation. The overall result is that the spectra are not constant, but show time-dependent behavior. Thus a more detailed correlation analysis is necessary for full description of dynamical beam--process-interactions.

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Ingo Decker, Holger Heyn, and Helmut Wohlfahrt "Dynamic behavior of the laser beam cutting and welding process due to instabilities of industrial high-power CO₂ lasers", Proc. SPIE 2062, Lasers as Tools for Manufacturing, (1 February 1994); https://doi.org/10.1117/12.167596

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