Sub 15 ps Self Mode-Locked Nd:YVO4 Laser through Intra-Cavity Sum-Frequency MixingMartin Brunzell, Max Widarsson, Fredrik Laurell and Valdas PasiskeviciusEPJ Web Conf., 267 (2022) 01017DOI: https://doi.org/10.1051/epjconf/202226701017