Using the Variable Pump Intensity method to measure optical gains and unveil photophysical and photonic phenomena in active waveguidesLuis Cerdán, Marco Anni, Maria Luisa De Giorgi, Pedro G. Boj and María Ángeles Díaz-GarcíaEPJ Web Conf., 243 (2020) 11002DOI: https://doi.org/10.1051/epjconf/202024311002