Characteristics and Mechanism of Up-conversion Luminescence in Er3+/Yb3+/Tb3+ Co-doped Oxyfluorogermanate Glasses
HU Yue-Bo1,2,3, QIU Jian-Bei2, ZHOU Da-Li1, YANG Zhen-Wen2, SONG Zhi-Guo2
Journal of Inorganic Materials . 2010, (5): 551 -556 .  DOI: 10.3724/SP.J.1077.2010.09878