22 April 1993 Space- and time-resolved laser beam diagnostics of high-power CO2 lasers during material processing
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Proceedings Volume 1834, Laser Energy Distribution Profiles: Measurement and Applications; (1993); doi: 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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Holger Heyn, Ingo Decker, Helmut Wohlfahrt, 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); doi: 10.1117/12.143856; https://doi.org/10.1117/12.143856
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KEYWORDS
Laser beam diagnostics

Materials processing

Carbon dioxide lasers

Signal processing

Detector arrays

High power lasers

Laser cutting

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