High-power, µJ-class Kerr-lens mode-locked thin-disk oscillators at 2.1 µm Sergei Tomilov, Mykyta Redkin, Yicheng Wang, Weichao Yao, Anna Suzuki, Martin Hoffmann and Clara J. Saraceno EPJ Web Conf., 307 (2024) 04005 Published online: 18 October 2024 DOI: 10.1051/epjconf/202430704005