The IFSW in cooperation with Cristal Laser S.A. and Trumpf Laser GmbH demonstrated a new record of the average power of an ultrafast laser with an emission in the visible spectral range .
Based on the IFSW’s thin-disk multipass amplifier architecture, infrared pulses (1030 nm) with a pulse duration of 8 picoseconds, a pulse energy of 6.8 mJ, and an average power of more than 2 kW could be generated with a close to diffraction limited beam quality. By means of efficient frequency doubling (> 70%) in a lithium-triborate crystal developed at Cristal Laser, visible laser pulses (515 nm) with an energy of more than 4.8 mJ and an average power of more than 1.4 kW were generated with a close to diffraction limited beam quality.
 Christoph Röcker, André Loescher, Florian Bienert, Philippe Villeval, Dominique Lupinski, Dominik Bauer, Alexander Killi, Thomas Graf, and Marwan Abdou Ahmed, "Ultrafast green thin-disk laser exceeding 1.4 kW of average power," Opt. Lett. 45, 5522-5525 (2020)
Contact: Dr. Marwan Abdou Ahmed