镱铒共掺硅酸盐玻璃三波段光致发光特性数值分析  

Photoluminescence Characteristics at Three-Wavebands for Yb^(3+)∶Er^(3+) Co-Doped Silicate Glasses

作　　者：李成仁[1] 尹洪杰[1] 明成国[1] 刘玉凤[2] 

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029 [2]辽宁师范大学实验中心,辽宁大连116029

出　　处：《中国稀土学报》2008年第3期313-318,共6页Journal of the Chinese Society of Rare Earths

基　　金：辽宁省科技厅基金(20062137)资助项目

摘　　要：考虑两级合作上转换、激发态吸收、交叉弛豫等非线性效应,建立了镱铒共掺硅酸盐玻璃材料9个能级的11个速率方程。唯象地构造了合作上转换系数随镱铒掺杂浓度的变化函数,数值模拟了镱铒共掺硅酸盐玻璃1530,664,549 nm 3个波段的光致发光强度与掺杂浓度、抽运功率的变化关系。计算结果表明:掺铒浓度一定,镱浓度增加时,对于1530 nm荧光而言,有最佳的掺镱浓度,但红光和绿光荧光强度随掺镱浓度始终增强;保持镱铒掺杂浓度不变,抽运功率增加时,3种荧光强度均单调增强,差别在于增幅速率不同,且近红外光强有饱和趋势。计算结果与实验测量相吻合。Considering two cooperative up-conver-sions, cross-relaxation and excited state the eleven rate equations of nine energy founded for Yb^3＋：Er^3＋ co-doped silicate absorption, levels were glasses. The linear variety of cooperation up-conversion coefficients as a function of dopant concentrations of ytterbium and erbium ions was constructed phenomenistically. The photoluminescence characteristics at 1530, 664, 549 nm, that was the relationship among photolumines- cence intensities and dopant concentration of Yb^3＋： Er^3＋ co-doped silicate glasses, pump power and Yb Er ratio were analyzed numerically. The results showed that there was an optimal Yb^3＋ concentration for 1530 nm peak when the Er^3＋ concentration and pump power were fixed. However, the red and green emission intensities always increase with Yb^3＋ concen-tration increasing. The photoluminescence intensities of three kinds of wavebands became monotonously stronger synchronously if the pump power increased while Yb^3＋ and Er^3＋ concentrations were kept constant. The difference among them was that the different ascending rate and near infrared PL intensity took on saturation trend. All simulation results were close to the experimental data.

关 键 词：镱铒共掺硅酸盐玻璃 合作上转换系数 光致发光特性 数值模拟 掺杂浓度 稀土 

分 类 号：O433.3[机械工程—光学工程] O614.344[理学—光学]