Yb^(3+)和Er^(3+)共掺杂氟硼酸盐玻璃材料光学跃迁及红外到可见上转换  

Optical Transitions and the Upconversion from IR to Visible of Yb^(3+) and Er^(3+) Co-doped Fluoroborate Glass

作　　者：陈宝玖[1,2] 王海宇[1,2] 秦伟平[1,2] 许武[1,2] 黄世华[1,2] 

机构地区：[1]中国科学院激发态物理开放研究实验室 [2]中国科学院长春光学精密机械与物理研究所,吉林长春130021

出　　处：《发光学报》2000年第1期38-42,共5页Chinese Journal of Luminescence

基　　金："8 63"计划!( 863 -715 -0 0 3 -0 0 10 );"973"国家重点基础研究规划-稀土功能材料的基础研究资助项目!( G19980 613 13 ;G19980

摘　　要：利用 J-O理论和吸收光谱实验数据计算了 Er3 +掺杂的氟硼酸盐玻璃材料的光学跃迁参数 ,从而得到了一些能级间跃迁的振子强度、跃迁几率、分支比、及寿命等数据。在室温下观察到了在 970 nm LD激发下红色和绿色上转换发光 ,讨论了红色上转换发光强度与 LD电流的关系。Fluoroborate glasses have been the subject of several spectroscopic investigations due to their potential as laser host matrix. In recent letters infrared conversion to visible and ultraviolet by Yb 3+ -Er 3+ and Yb 3+ -Ho 3+ ions in some glasses host has been reported. In this paper, the aim is to find suitable host for upconversion luminescence, and a fluoroborate glass co doped with Yb 3+ and Er 3+ was designed. The optical transition properties and upconversion under 970nm LD excitation were discussed for this glass sample. The fluoroborate glass with component 30H 3BO 3 15AlF 3 19.5PbF 2 10BaF 2 10ZnF 2 10NaF 5Yb 2O 3 0.5Er 2O 3 was prepared. The absorption spectrum was measured in visible range from 350nm to 700nm. The J O theory was used to calculate the optical properties of Er 3+ and Yb 3+ codoped in fluoroborate glass. The J O parameters were obtained, Ω =1.2E 20(cm 2), Ω =3.6E 20(cm 2), Ω =7.7E 21(cm 2). The transition probabilities, the oscillator strengths, branching ratios and the radioactive lifetimes were obtained. The red ( 4F 9/2 → 4I 15/2 ) and green ( 2H 11/2 , 4S 3/2 → 4I 15/2 ) upconversion luminescence under 970nm LD excitation was observed, the upconversion mechanism was discussed. In this system the upconversion luminescence by energy transfer from Yb 3+ to Er 3+ and from Er 3+ to Er 3+ and excited state absorption of Er 3+ was proposed. The relationship between LD working current and intensity of upconversion luminescence was discussed. The results confirmed that the upconversion process is consisted by two photons.

关 键 词：硼酸盐玻璃 镱 铒 掺杂 光学跃迁 

分 类 号：TQ171.718[化学工程—玻璃工业] O482.31[化学工程—硅酸盐工业]