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Proceedings Paper

Space- and time-resolved laser beam diagnostics of high-power CO2 lasers during material processing
Author(s): Holger Heyn; Ingo Decker; Helmut Wohlfahrt; Wolf-Dieter Scharfe
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Paper Abstract

A measuring device for the intensity profile of high-power CO2 laser beams based on a linear pyroelectric detector array is presented. It enables the user to measure variations of the mode structure up to several kHz with a one dimensional spatial resolution. Periodic as well as stochastic fluctuations of the local intensity are analyzed, leading to fundamental considerations to characterize the temporal stability of laser beams. Simultaneously to the laser beam diagnostic, signals obtained from the cutting and welding process have been detected. By the comparison of these signals with the time-resolved measurement of the intensity profile, the influence of laser mode instabilities on the material processing is documented.

Paper Details

Date Published: 22 April 1993
PDF: 11 pages
Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); doi: 10.1117/12.143856
Show Author Affiliations
Holger Heyn, Technical Univ. of Braunschweig (Germany)
Ingo Decker, Technical Univ. of Braunschweig (Germany)
Helmut Wohlfahrt, Technical Univ. of Braunschweig (Germany)
Wolf-Dieter Scharfe, Rofin-Sinar Laser GmbH (Germany)

Published in SPIE Proceedings Vol. 1834:
Laser Energy Distribution Profiles: Measurement and Applications
James M. Darchuk, Editor(s)

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