On-line measurements of beam quality parameters on industrial CO2 lasers related to capabilities in material processing

Ole Gregersen; Henning Jorgensen; Flemming O. Olsen

doi:10.1117/12.143857

22 April 1993 On-line measurements of beam quality parameters on industrial CO2 lasers related to capabilities in material processing

Ole Gregersen, Henning Jorgensen, Flemming O. Olsen

Author Affiliations +

Proceedings Volume 1834, Laser Energy Distribution Profiles: Measurement and Applications; (1993) https://doi.org/10.1117/12.143857
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

The main parameters used for describing the beam quality of CO₂ lasers are the Beam Quality Number, energy distribution, the geometry of the beam path including the beam waist diameter, position of the beam waist and the divergence of the beam. In this paper experimental investigations of the relationship between the beam geometry parameters and the processing performance are presented. The experiments have been carried out with a portable beam analyzing system developed at the Technical University of Denmark. The beam parameters are automatically detected within a few seconds from one single measurement in an arbitrary point in the beam path of the laser, and from these parameters the focus conditions of the beam are calculated. The experiments were made on a number of industrial used laser cutting systems in the power range 1 - 2 kW and a strong correlation between the beam parameters and the cutting performance is demonstrated. The investigations have furthermore demonstrated large possibilities for optimization of the optical systems when the beam parameters are known.

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Ole Gregersen, Henning Jorgensen, and Flemming O. Olsen "On-line measurements of beam quality parameters on industrial CO2 lasers related to capabilities in material processing", Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); https://doi.org/10.1117/12.143857

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KEYWORDS

Laser cutting

Laser systems engineering

Laser processing

Optical testing

Beam analyzers

Laser energy

Materials processing

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