Er3+–Yb3+ codoped oxyfluoride germanate glass ceramics containing SrF2 nanocrystals for 1.5 µm optical amplification. - Li, Siqiang; Zhang, Xizhen; Song, Linke; Zhang, Yanqiu; Gao, Duan; Zhang, Sujuan; Pan, Xiuyu; Zhang, Yuhang; Chen, Baojiu (Journal of the American Ceramic Society, 2025)