Spectroscopy study of tellurite-germane-tungsten-zinc glasses codoped with Er3+ and Pr3+ - Chacaliaza-Ricaldi, José Yitzhak Aarón; Calderón, Gaston Lozano; Huaman, Jose Luis Clabel; Rivera, Victor Anthony Garcia; Messaddeq, Younés; Marega Junior, Euclydes (Semana Integrada do Instituto de Física de São Carlos - SIFSC, 2022)