Ho(0.5)Yb(5)氟氧化物玻璃的直接上转换增敏发光  

The Direct Sensitization Upconversion Luminescence of Ho(0.5)Yb(5): Oxyfluoride Glass

作　　者：陈晓波[1] 宋增福[2] 

机构地区：[1]北京师范大学应用光学重点实验室 [2]北京大学物理学院,北京100871

出　　处：《光谱学与光谱分析》2003年第3期426-430,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (1 98740 33)和 (1 0 1 740 0 8)

摘　　要：本文研究了HoYb共掺氟氧化物玻璃的直接上转换增敏发光现象。发现了位于 (5 4 4 5nm ,1836 5cm- 1 )和 (6 5 8 5nm ,15 186cm- 1 )的两条很强的上转换发光 ,它们是 5S2 → 5I8和5F5→ 5I8的荧光跃迁。还有其他的一些上转换发光5F3→ 5I8,5S2 → 5I7和5I4 → 5I8的跃迁。还发现存在一种特征的饱和现象 ,即所有上转换发光随激光功率变化的F P双对数关系曲线都是一条相当好的直线 ,其斜率会随着光斑的增大而增大 ,由分析得知这是由能量扩能散造成的。The direct sensitization upconversion luminescence phenomenon of Ho(0.5) Yb(5) co-doped oxyfluoride glass was studied. There are two strong upconversion. luminescence lines positioned at (544.5 nm, 18 365 cm(-1)) and (658.5 nm, 15 186 cm(-1)) which are the transitions of S-5(2) --> I-5(8) and F-5(5) --> I-5(8). There are others upconversion luminescence lines, which are F-5(3) --> I-5(8), S-5(8) --> I-5(7) and I-5(4) --> I-5(8). An evident characteristic saturation phenomenon is found also. That is all the F-P log-log curves of upconversion fluorescence vs. pumping laser power are rather good straight lines. Its slope will increase with enhancement of pumping laser facula. This is mainly caused by energy diffusion among Yb3+ ions.

关 键 词：Ho(0.5)Yb(5)氟氧化物玻璃 直接上转换增敏发光 特征饱和现象 激光功率 

分 类 号：TQ171.112[化学工程—玻璃工业] TN24[化学工程—硅酸盐工业]