Sub 15 ps Self Mode-Locked Nd:YVO4 Laser through Intra-Cavity Sum-Frequency Mixing Martin Brunzell, Max Widarsson, Fredrik Laurell and Valdas Pasiskevicius EPJ Web Conf., 267 (2022) 01017 Published online: 18 October 2022 DOI: 10.1051/epjconf/202226701017