Mr. Sören Kumkar Profile

Sören Kumkar

at TRUMPF Laser GmbH

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Proceedings Article | 15 February 2018 Paper

New generation of compact high power disk lasers

Stefanie Feuchtenbeiner, Sebastian Zaske, Sven-Silvius Schad, Tina Gottwald, Vincent Kuhn, Sören Kumkar, Bernd Metzger, Alexander Killi, Patrick Haug, Nicolai Speker

Proceedings Volume 10511, 105110L (2018) https://doi.org/10.1117/12.2289916

KEYWORDS: Disk lasers, Laser welding, Copper, High power lasers, Laser processing, Laser applications

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New technological developments in high power disk lasers emitting at 1030 nm are presented. These include the latest generation of TRUMPF’s TruDisk product line offering high power disk lasers with up to 6 kW output power and beam qualities of up to 4 mm*mrad. With these compact devices a footprint reduction of 50% compared to the previous model could be achieved while at the same time improving robustness and increasing system efficiency. In the context of Industry 4.0, the new generation of TruDisk lasers features a synchronized data recording of all sensors, offering high-quality data for virtual analyses. The lasers therefore provide optimal hardware requirements for services like Condition Monitoring and Predictive Maintenance. We will also discuss its innovative and space-saving cooling architecture. It allows operation of the laser under very critical ambient conditions.

Furthermore, an outlook on extending the new disk laser platform to higher power levels will be given. We will present a disk laser with 8 kW laser power out of a single disk with a beam quality of 5 mm*mrad using a 125 μm fiber, which makes it ideally suited for cutting and welding applications.

The flexibility of the disk laser platform also enables the realization of a wide variety of beam guiding setups. As an example a new scheme called BrightLine Weld will be discussed. This technology allows for an almost spatter free laser welding process, even at high feed rates.

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