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Proceedings Paper

Optical components for tailoring beam properties of multi-kW diode lasers
Author(s): Tobias Könning; Bernd Köhler; Paul Wolf; Andreas Bayer; Ralf Hubrich; Christian Bodem; Nora Plappert; Tobias Kindervater; Wilhelm Faßbender; Sascha Dürsch; Matthias Küster; Jens Biesenbach
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Paper Abstract

One important aspect for the increasing use of diode lasers in industrial applications is the flexibility of diode lasers to tailor the beam properties to the specific needs demanded from the application. For fiber coupled solutions beam shaping with appropriate micro-optical elements is used for efficient fiber coupling of the highly asymmetric diode laser beam, whereas for direct applications optical elements are used to generate specific intensity distributions, like homogenized lines, areas and rings. Applications with diode lasers like solid state laser pump sources often require tailored spectral characteristics with narrow bandwidth, which is realized by using volume Bragg gratings for wavelength stabilization.

In this paper we will summarize several concepts for adapting beam properties of diode lasers by using specific optical components. For building very compact laser modules of up to 2 kW we already presented a concept based on beam shaping of high fill factor bars. In this paper we will focus on further tailoring the beam properties of these very compact laser modules in the wavelength range from 808 nm up to 1020 nm. Fiber coupling of such modules into an 800 μm NA0.22 fiber yielded 1.6 kW without using polarization coupling. Another example is the generation of a 2.5 kW homogenized line with 40 mm length and a width of 4 mm.

Paper Details

Date Published: 22 February 2017
PDF: 10 pages
Proc. SPIE 10085, Components and Packaging for Laser Systems III, 100850G (22 February 2017);
Show Author Affiliations
Tobias Könning, DILAS Diodenlaser GmbH (Germany)
Bernd Köhler, DILAS Diodenlaser GmbH (Germany)
Paul Wolf, DILAS Diodenlaser GmbH (Germany)
Andreas Bayer, DILAS Diodenlaser GmbH (Germany)
Ralf Hubrich, DILAS Diodenlaser GmbH (Germany)
Christian Bodem, DILAS Diodenlaser GmbH (Germany)
Nora Plappert, DILAS Diodenlaser GmbH (Germany)
Tobias Kindervater, DILAS Diodenlaser GmbH (Germany)
Wilhelm Faßbender, DILAS Diodenlaser GmbH (Germany)
Sascha Dürsch, DILAS Diodenlaser GmbH (Germany)
Matthias Küster, DILAS Diodenlaser GmbH (Germany)
Jens Biesenbach, DILAS Diodenlaser GmbH (Germany)

Published in SPIE Proceedings Vol. 10085:
Components and Packaging for Laser Systems III
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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