Space- and time-resolved laser beam diagnostics of high-power CO2 lasers during material processing

Holger Heyn; Ingo Decker; Helmut Wohlfahrt; Wolf-Dieter Scharfe

doi:10.1117/12.143856

22 April 1993 Space- and time-resolved laser beam diagnostics of high-power CO2 lasers during material processing

Holger Heyn, Ingo Decker, Helmut Wohlfahrt, Wolf-Dieter Scharfe

Proceedings Volume 1834, Laser Energy Distribution Profiles: Measurement and Applications; (1993) https://doi.org/10.1117/12.143856
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

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.

Citation Download Citation

Holger Heyn, Ingo Decker, Helmut Wohlfahrt, and Wolf-Dieter Scharfe "Space- and time-resolved laser beam diagnostics of high-power CO2 lasers during material processing", Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); https://doi.org/10.1117/12.143856

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