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Proceedings Paper

Brilliant high power laser bars for industrial applications
Author(s): Harald König; Günther Grönninger; Peter Brick; Martin Reufer; Frank Bugge; Götz Erbert; Michael Stoiber; Jens Biesenbach; Dirk Lorenzen; Petra Hennig; Uwe Strauß
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Paper Abstract

High power semiconductor lasers are commonly used as efficient pump sources for solid state lasers or multiplexing applications. Common wavelengths are 808nm e.g. for pumping of Nd:YAG and 9xx nm for pumping of disk or fiber lasers. Together with these wavelengths 880nm can be used as 3rd or 4th wavelength for multiplexing in direct material processing lasers. These industrial lasers are typically operating with some kW laser output power. For scaling to higher powers up to several kW, management of waste energy and power supply is gaining more and more importance. High efficient and reliable diode sources are vital to build systems with very good overall performance. The German framework project "BRILASI" had the target to develop basic technologies of next generation brilliant high power diode lasers for industrial applications. In this paper we present laser bars which combine industrial standards with highest efficiencies at 808, 880, 940 and 980nm and power range above 100W/bar. Room temperature efficiencies of 70% were demonstrated at wavelengths above 900nm and power levels of 130W. For 808nm, we reached efficiencies up to 62% at 20°C. For high temperature operation, we will show laser structures of 808nm optimized for 50°C.

Paper Details

Date Published: 25 February 2008
PDF: 8 pages
Proc. SPIE 6876, High-Power Diode Laser Technology and Applications VI, 687616 (25 February 2008);
Show Author Affiliations
Harald König, OSRAM Opto Semiconductors GmbH (Germany)
Günther Grönninger, OSRAM Opto Semiconductors GmbH (Germany)
Peter Brick, OSRAM Opto Semiconductors GmbH (Germany)
Martin Reufer, OSRAM Opto Semiconductors GmbH (Germany)
Frank Bugge, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
Götz Erbert, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
Michael Stoiber, DILAS Diodenlaser GmbH (Germany)
Jens Biesenbach, DILAS Diodenlaser GmbH (Germany)
Dirk Lorenzen, JENOPTIK Laserdiode GmbH (Germany)
Petra Hennig, JENOPTIK Laserdiode GmbH (Germany)
Uwe Strauß, OSRAM Opto Semiconductors GmbH (Germany)

Published in SPIE Proceedings Vol. 6876:
High-Power Diode Laser Technology and Applications VI
Mark S. Zediker, Editor(s)

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