Dai Nengli, Xu Bing, Jiang Zuowen, Peng Jingang, Li Haiqing, Luan Huaixun, Yang Luyun, Li Jinyan
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Opt Express. 2010 Aug 30;18(18):18642-8. doi: 10.1364/OE.18.018642.
The effect of Yb(3+) concentration on the broadband emission intensity and peak wavelength shift in Yb/Bi ions co-doped silicate glasses is investigated. The optimal Bi(2)O(3) concentration range is about 2.0-2.5 mol% in 65SiO(2)-10Al(2)O(3)-25CaO matrix (SAC glasses). For Yb/Bi codoped SAC glasses, the maximum emission intensity excited by 980 nm LD is ~30 times and 1.5 times higher than that of single Bi-doped SAC glasses excited by 980 nm and 808 nm LD, respectively, the peak emission shows obvious red-shift from 1185 nm to 1235 nm band with the Yb(2)O(3) concentration change from 0 to 3.0 mol%. For the same Yb(2)O(3) concentration in SAC glasses, the measured fluorescence lifetime near 1020 nm of single Yb(3+)-doped glasses is longer than that of Yb/Bi codoping glasses, which implyes the efficient energy transfer from Yb(3+) to Bi(n+) in SAC glasses. The results indicate Yb(2)O(3) can be induced into the bismuth-doped silicate glasses to enhance the emission intensity and control the peak wavelength.
研究了Yb(3+)浓度对Yb/Bi离子共掺杂硅酸盐玻璃中宽带发射强度和峰值波长位移的影响。在65SiO(2)-10Al(2)O(3)-25CaO基体（SAC玻璃）中，最佳Bi(2)O(3)浓度范围约为2.0-2.5 mol%。对于Yb/Bi共掺杂的SAC玻璃，980 nm激光二极管激发的最大发射强度分别比980 nm和808 nm激光二极管激发的单Bi掺杂SAC玻璃高约30倍和1.5倍，随着Yb(2)O(3)浓度从0变化到3.0 mol%，峰值发射从1185 nm到1235 nm波段呈现明显的红移。对于SAC玻璃中相同的Yb(2)O(3)浓度，单Yb(3+)掺杂玻璃在1020 nm附近测得的荧光寿命比Yb/Bi共掺杂玻璃长，这意味着在SAC玻璃中存在从Yb(3+)到Bi(n+)的有效能量转移。结果表明，可以将Yb(2)O(3)引入铋掺杂硅酸盐玻璃中以增强发射强度并控制峰值波长。
