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Proceedings Paper

Brightness and average power as driver for advancements in diode lasers and their applications
Author(s): Stefan Hengesbach; Reinhart Poprawe; Dieter Hoffmann; Martin Traub; Thomas Schwarz; Carlo Holly; Florian Eibl; Andreas Weisheit; Sabrina Vogt; Simon Britten; Michael Ungers; Ulrich Thombansen; Christoph Engelmann; Viktor Mamuschkin; Philipp Lott
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Paper Abstract

Spatial and spectral emission characteristics and efficiency of high-power diode laser (HPDL) based pump sources enable and define the performance of the fundamental solid state laser concepts like disk, fiber and slab lasers. HPDL are also established as a versatile tool for direct materials processing substituting other laser types like CO2 lasers and lamp pumped solid state lasers and are starting to substitute even some of the diode pumped solid state lasers. Both, pumping and direct applications will benefit from the further improvement of the brightness and control of the output spectrum of HPDL. While edge emitting diodes are already established, a new generation of vertical emitting diode lasers (VCSELs) made significant progress and provides easy scalable output power in the kW range. Beneficial properties are simplified beam shaping, flexible control of the temporal and spatial emission, compact design and low current operation. Other characteristics like efficiency and brightness of VCSELs are still lagging behind the edge emitter performance. Examples of direct applications like surface treatment, soldering, welding, additive manufacturing, cutting and their requirements on the HPDL performance are presented. Furthermore, an overview on process requirements and available as well as perspective performance of laser sources is derived.

Paper Details

Date Published: 13 March 2015
PDF: 18 pages
Proc. SPIE 9348, High-Power Diode Laser Technology and Applications XIII, 93480B (13 March 2015); doi: 10.1117/12.2085068
Show Author Affiliations
Stefan Hengesbach, Fraunhofer-Institut für Lasertechnik (Germany)
Reinhart Poprawe, Fraunhofer-Institut für Lasertechnik (Germany)
RWTH Aachen Univ. (Germany)
Dieter Hoffmann, Fraunhofer-Institut für Lasertechnik (Germany)
Martin Traub, Fraunhofer-Institut für Lasertechnik (Germany)
Thomas Schwarz, RWTH Aachen Univ. (Germany)
Carlo Holly, RWTH Aachen Univ. (Germany)
Florian Eibl, Fraunhofer-Institut für Lasertechnik (Germany)
Andreas Weisheit, Fraunhofer-Institut für Lasertechnik (Germany)
Sabrina Vogt, Fraunhofer-Institut für Lasertechnik (Germany)
Simon Britten, Fraunhofer-Institut für Lasertechnik (Germany)
Michael Ungers, Fraunhofer-Institut für Lasertechnik (Germany)
Ulrich Thombansen, Fraunhofer-Institut für Lasertechnik (Germany)
Christoph Engelmann, Fraunhofer-Institut für Lasertechnik (Germany)
Viktor Mamuschkin, Fraunhofer-Institut für Lasertechnik (Germany)
Philipp Lott, Fraunhofer-Institut für Lasertechnik (Germany)

Published in SPIE Proceedings Vol. 9348:
High-Power Diode Laser Technology and Applications XIII
Mark S. Zediker, Editor(s)

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