1 mJ 20 kHz efficient and robust end-pumped Yb:YAG femtosecond laser for nonlinear frequency conversion Julius Lukošiūnas, Raimundas Burokas, Aivaras Kazakevičius, Rokas Danilevičius and Andrejus Michailovas EPJ Web Conf., 307 (2024) 04019 Published online: 18 October 2024 DOI: 10.1051/epjconf/202430704019