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Proceedings Paper

Radially polarized high-power lasers
Author(s): Marwan Abdou Ahmed; Andreas Voß; Moritz M. Vogel; Armin Austerschulte; Joachim Schulz; Volker Metsch; Tobias Moser; Thomas Graf
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Paper Abstract

In the recent years high-power laser beams with radial polarization have attracted an increasing interest because of their interesting properties in material processing. We present an overview of the current activities and different techniques to generate such beams in CO2 and solid-state lasers. With a polarising end-mirror which comprises a resonant grating on a dielectric multilayer Bragg-structure we recently demonstrated a 3-kW radially polarised CO2 laser. Current investigations are also focused especially on the application of this technology to thin-disk lasers. The specific requirements and the whole development from the design and fabrication to the characterization and test are illustrated with the example of a multilayer polarizing grating mirror developed to generate a radially polarised beam in an Yb:YAG thin-disc laser resonator. The potential of this kind of beams are discussed with a number of first application results, which largely confirm the predictions presented by Niziev et al1.

Paper Details

Date Published: 21 April 2009
PDF: 10 pages
Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 71311I (21 April 2009); doi: 10.1117/12.816818
Show Author Affiliations
Marwan Abdou Ahmed, Univ. Stuttgart (Germany)
Andreas Voß, Univ. Stuttgart (Germany)
Moritz M. Vogel, Univ. Stuttgart (Germany)
Armin Austerschulte, Univ. Stuttgart (Germany)
Joachim Schulz, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Volker Metsch, TRUMPF Werkzeugmaschinen GmbH + Co. KG (Germany)
Tobias Moser, LASAG AG (Switzerland)
Thomas Graf, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 7131:
XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Rui Vilar; Olinda Conde; Marta Fajardo; Luís O. Silva; Margarida Pires; Andrei Utkin, Editor(s)

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