Mainz 2026 – scientific programme
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 2: Laser Systems and their Applications II
K 2.1: Talk
Monday, March 2, 2026, 17:00–17:15, HS 20
Diode-Pumped and Helium-Gas-Cooled Yb:YAG Multi-Slab Amplifier with > 10 J Pulse Energy and > 1 Hz Repetition Rate — •Katrin Schulz1,2, Klaus Ertel1, Markus Graf1, Harald Rapp1, Aleksander Budnicki1, Klaus Albers1, Thomas Dekorsy2,3, and Bernd Metzger1 — 1Trumpf Laser SE, 78713 Schramberg, Germany — 2University of Stuttgart, 70569 Stuttgart, Germany — 3German Aerospace Center (DLR), 70569 Stuttgart, Germany
We report on a high-energy, diode-pumped solid-state laser employing a multi-slab multi-pass Yb:YAG amplifier operating with helium gas cooling at room temperature. So far, the highest measured parameters with this setup are 10.4 J pulse energy at 20 ns pulse duration, an optical-to-optical efficiency of 23 %, and a repetition rate of 10 Hz. Furthermore, an output energy stability of 0.17 % (std. dev.) was demonstrated over 20 minutes. The current results demonstrate the potential to increase the output energy and repetition rate to approximately 20 J and 100 Hz, respectively, within a reasonable timescale. This demonstration of room temperature operation brings industrial application of high-energy and high-average power laser systems closer to reality.
Keywords: high energy laser; Hochenergie Laser; peak power; industrial; Industrie