Visible high power fiber coupled diode lasers

Bernd Köhler; Simon Drovs; Michael Stoiber; Sascha Dürsch; Heiko Kissel; Tobias Könning; Jens Biesenbach; Harald König; Alfred Lell; Bernhard Stojetz; Andreas Löffler; Uwe Strauß

doi:10.1117/12.2291397

19 February 2018 Visible high power fiber coupled diode lasers

Bernd Köhler, Simon Drovs, Michael Stoiber, Sascha Dürsch, Heiko Kissel, Tobias Könning, Jens Biesenbach, Harald König, Alfred Lell, Bernhard Stojetz, Andreas Löffler, Uwe Strauß

Author Affiliations +

Proceedings Volume 10514, High-Power Diode Laser Technology XVI; 1051408 (2018) https://doi.org/10.1117/12.2291397
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

In this paper we report on further development of fiber coupled high-power diode lasers in the visible spectral range. New visible laser modules presented in this paper include the use of multi single emitter arrays @ 450 nm leading to a 120 W fiber coupled unit with a beam quality of 44 mm x mrad, as well as very compact modules with multi-W output power from 405 nm to 640 nm. However, as these lasers are based on single emitters, power scaling quickly leads to bulky laser units with a lot of optical components to be aligned.

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, and Uwe Strauß "Visible high power fiber coupled diode lasers", Proc. SPIE 10514, High-Power Diode Laser Technology XVI, 1051408 (19 February 2018); https://doi.org/10.1117/12.2291397

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