Numerical Analysis of an Yb3+:Er3+:Tm3+:Ho3+ Wideband Optical Fiber AmplifierRiccardo Ballarini, Antonella Maria Loconsole, Marcin Kochanowicz, Dominik Dorosz, Francesco Prudenzano and Stefano TaccheoEPJ Web Conf., 335 (2025) 07012DOI: https://doi.org/10.1051/epjconf/202533507012