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 x 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.
S. G. Strohmaier, G. Erbert, A. H. Meissner-Schenk, M. Lommel, B. Schmidt, T. Kaul, M. Karow, and P. Crump, "kW-class diode laser bars," Proc. SPIE 10086, High-Power Diode Laser Technology XV, 100860C (Presented at SPIE LASE: January 30, 2017; Published: 27 February 2017); https://doi.org/10.1117/12.2250383.
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