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Proceedings Paper

Industrial 30-kW CO2 laser with fast axial gas flow and rf excitation
Author(s): Uwe Habich; Peter Loosen; Christoph Hertzler; Reinhard Wollermann-Windgasse
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Paper Abstract

A CO2 laser with fast axial gas flow was set up and operated with a maximum cw output power above 30 kW. The laser makes use of 8 rf-excited discharges which were optimized regarding to the gas-flow, to the discharge homogeneity and to the optical properties of the gain medium. Results of experimental investigation of these topics are described as well as performance characteristics of the laser system equipped with a stable and an unstable resonator, respectively. With an unstable resonator and an aerodynamic window for the extraction of the beam the laser system gives a beam quality which is close to the diffraction limit for this type of resonator. Disregarding the difficulties which are related to the definition and measurement of beam quality for unstable resonators, the beam quality could be described as M2 equals 3. Measured far field intensity profiles in the focal plane of a focusing optics are presented as well as the beam propagation behavior near focus. First results of applications in materials processing are discussed.

Paper Details

Date Published: 29 March 1996
PDF: 11 pages
Proc. SPIE 2702, Gas and Chemical Lasers, (29 March 1996); doi: 10.1117/12.236892
Show Author Affiliations
Uwe Habich, Fraunhofer-Institut fuer Lasertechnik (Germany)
Peter Loosen, Fraunhofer-Institut fuer Lasertechnik (Germany)
Christoph Hertzler, Trumpf Laser-Forschungs- und Entwicklungsgesellschaft (Germany)
Reinhard Wollermann-Windgasse, Trumpf Laser-Forschungs- und Entwicklungsgesellschaft (Germany)

Published in SPIE Proceedings Vol. 2702:
Gas and Chemical Lasers
Robert C. Sze, Editor(s)

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