Red emission, upconversion and intensity parameters of erbium oxide doped tellurite glass for laser glass. - Azlan, M. N.; Azlina, Y.; Shaari, H. R.; Nazrin, S. N.; Al-Hada, Naif Mohammed; Boukhris, Imed; Umar, S. A.; Zaid, M. H. M.; Hisam, R.; Iskandar, S. M.; Kenzhaliyev, B. K. (Journal of Materials Science: Materials in Electronics, 2021)