High performance bars were enabled by defeating fundamental challenges like material quality as well as the chip processes, both of which differ significantly from well-known IR laser bars. The research samples were assembled on actively cooled heat sinks with hard solder technology. For the first time an output power of 98W per bar at 60A drive current was achieved. Conversion efficiency as high as 46% at 50W output power was demonstrated.
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H. König, A. Lell, B. Stojetz, M. Ali, C. Eichler, M. Peter, A. Löffler, U. Strauss, M. Baumann, A. Balck, J. Malchus, V. Krause, "Blue 450nm high power semiconductor continuous wave laser bars exceeding rollover output power of 80W," Proc. SPIE 10514, High-Power Diode Laser Technology XVI, 1051402 (19 February 2018);