We also report on a new approach based on 450 nm diode laser bars, which dramatically reduces size and alignment effort. These activities were performed within the German government-funded project “BlauLas”: a maximum output power of 80 W per bar has been demonstrated @ 450 nm. We show results of a 200 μm NA0.22 fiber coupled 35 W source @ 450 nm, which has been reduced in size by a factor of 25 compared to standard single emitter approach. In addition, we will present a 200 μm NA0.22 fiber coupled laser unit with an output power of 135 W.
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Bernd Köhler, Simon Drovs, Michael Stoiber, Sascha Dürsch, Heiko Kissel, Tobias Könning, Jens Biesenbach, Harald König, Alfred Lell, Bernhard Stojetz, Andreas Löffler, Uwe Strauß, "Visible high power fiber coupled diode lasers," Proc. SPIE 10514, High-Power Diode Laser Technology XVI, 1051408 (19 February 2018);