Multi-Watt, mJ nanosecond pulses amplification in a Yb:LuLiF4 single crystal fiber grown by micro-pulling-downS. Pizzurro, F. Pirzio, S. Jun, A. Di Lieto, M. Tonelli and A. AgnesiEPJ Web Conf., 243 (2020) 05001DOI: https://doi.org/10.1051/epjconf/202024305001