Chen X, Li M, Hao Z, Meng G, Song Z
Analytical and Testing Center, Beijing Normal University, 100875 Beijing.
Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Jun;21(3):271-4.
This paper researches the upconversion luminescence of Er:ZBLAN and ErYb:ZBLAN glasses excited by 966 nm diode laser. It is found that there is a new kind of "characteristic saturation phenomenon". It is that the log-log plot's slope of upconversion luminescence intensity upon laser power of ErYb:ZBLAN glass is decreased clearly than that of Er:ZBLAN, and both of their log-log plots are rather good straight line. This upconversion mechanism is a new kind of "diffusion-transfer" mechanism, that is energy diffusion among Yb3+ ions sequential followed by energy transfer between Er(3+)-Yb3+ ions. The "characteristic saturation phenomenon" is just resulted from energy diffusion.
本文研究了966nm二极管激光器激发下Er:ZBLAN和ErYb:ZBLAN玻璃的上转换发光。发现存在一种新型的“特征饱和现象”。即ErYb:ZBLAN玻璃上转换发光强度随激光功率的对数-对数图斜率比Er:ZBLAN的明显降低，且二者的对数-对数图均为相当好的直线。这种上转换机制是一种新型的“扩散-转移”机制，即Yb3+离子间的能量扩散随后是Er(3+)-Yb3+离子间的能量转移。“特征饱和现象”正是由能量扩散导致的。
