Quantitative analysis of a CO2 laser beam by PMMA burn patterns

Rene C. Joeckle; Axel Koeneke; Andre Sontag

doi:10.1117/12.25987

1 February 1991 Quantitative analysis of a CO2 laser beam by PMMA burn patterns

Rene C. Joeckle, Axel Koeneke, Andre Sontag

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25987
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

A quantitative knowledge of the threshold fluence of surface damage produced by the CO2 laser irradiation of a PMMA plate enables us to design a simple method of measuring the power density distribution in a CO2 laser beam. By varying the irradiation times, one obtains several burn patterns, each of them characteristic of a well-defined power density. The power density distribution can then be drawn. This method has been used for studying the power density distribution in several high-power laser beams. Although it is non-instantaneous, this simple and cheap method offers a large spatial resolution and gives interesting results when compared to sophisticated CO2 beam analysers.

Citation Download Citation

Rene C. Joeckle, Axel Koeneke, and Andre Sontag "Quantitative analysis of a CO2 laser beam by PMMA burn patterns", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25987

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