光学学报, 1999, 19 (12): 1698, 网络出版: 2006-08-09
(Er3+, Yb3+)共掺ZBLAN玻璃的一种新颖的类雪崩上转换发光现象
A New Kind of Quasi-Avalanche Up-Conversion Luminescence in Er3+ and Yb3+ Co-Doped ZBLAN Glasses
上转换发光 类雪崩效应 二次攀升现象 Yb3+和Er3+离子 ZBLAN玻璃 up-conversion luminescence quasi-avalanche effect “second uprising” phenomenon Yb3+ and Er3+ ions ZBLAN glasses
摘要
研究了Er3+:ZBLAN和(Yb3+, Er3+):ZBLAN玻璃在966nm半导体激光激发下的上转换发光现象, 发现在(Yb3+, Er3+):ZBLAN玻璃样品上存在由Er3+离子间交叉弛豫导致的上转换发光随激光功率二次攀升的类雪崩上转换发光现象； 并且由稳态速率方程的数值计算得出与实验测量相吻合的结果： 当Er3+离子间的交叉弛豫P很小时, 上转换发光是随抽运激光功率的增强而逐渐趋向饱和的； 当P较大时, (Yb3+, Er3+:ZBLAN玻璃由于Yb3+和Er3+离子间的交叉能量传递速率很大, 致使Er3+离子的上转换激发速率R很大, 造成上转换发光在达到饱和之前出现一个陡升, 这就是实验观察到的由类雪崩效应导致的上转换发光随激光功率二次攀升的现象。
Abstract
The upconversion luminescence phenomena induced by 966 nm diode laser in Er:ZBLAN and Yb、 Er:ZBLAN glasses are studied. A new kind of quasi-avalanche up-conversion luminescence phenomenon is found. The results calculated from state rate equations are coincident with the experiment. When cross-relaxation P between Er3+ ions is very small, up-conversion fluorescence intensity enhances gradually along with the increase of pumping laser power and tends gradually to saturation; when cross-relaxation P is large, duo to the large energy cross-transfer of Yb、 Er:ZBLAN glass between Yb3+ and Er3+ ions, the upconversion excitation velocity R of Er3+ ion is high enough to lead the up-conversion luminescence having a steep raise before it gets saturation. This is the phenomenon of “second uprising” observed in the experiment induced by quasi-avalanche effect.
陈晓波, 郝昭, 王虹, 冯衍, 邓志威, 孙寅官, 赵承易, 聂玉昕. (Er3+, Yb3+)共掺ZBLAN玻璃的一种新颖的类雪崩上转换发光现象[J]. 光学学报, 1999, 19(12): 1698. 陈晓波, 郝昭, 王虹, 冯衍, 邓志威, 孙寅官, 赵承易, 聂玉昕. A New Kind of Quasi-Avalanche Up-Conversion Luminescence in Er3+ and Yb3+ Co-Doped ZBLAN Glasses[J]. Acta Optica Sinica, 1999, 19(12): 1698.
PDF全文
