kW-class Diode Laser Bars

S.G. Strohmaier1, G. Erbert1, A.H. Meissner-Schenk1, M. Lommel1, B. Schmidt2, T. Kaul3, M. Karow3 and P. Crump3

Published in:

Proc. SPIE 10085, Photonics West, San Francisco, USA, Jan 28 - Feb 02, 100850F (2017).

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Abstract:

Progress will be presented on ongoing research into the development of ultra-high power and efficiency bars achieving significantly higher output power, conversion efficiency and brightness than currently commercially available. We combine advanced InAlGaAs/GaAs-based epitaxial structures and novel lateral designs, new materials and superior cooling architectures to enable improved performance. Specifically, we present progress in kilowatt-class 10-mm diode laser bars, where recent studies have demonstrated 880 W continuous wave output power from a 10 mm × 4 mm laser diode bar at 850 A of electrical current and 15°C water temperature. This laser achieves > 60% electro-optical efficiency at 880 W CW output power.

1 TRUMPF Laser GmbH, Niederlassung Berlin, Berlin, Germany
2 TRUMPF Photonics INC, Cranbury, NJ, USA
3 Ferdinand-Braun-Institut, Leibniz Institut für Höchstfrequenztechnik, Berlin, Germany

Keywords:

diode laser, kilowatt optical output, continuous wave, conversion efficiency.