Spectroscopic investigation of a new crystal： Nd^3＋,Yb^3＋：YVO4

The absorption and emission spectra of the YVO4 single crystal co-doped with 1 at.% Nd^3＋ and 1 at.% Yb^3＋ are investigated. The efficient Nd^3＋ → Yb^3＋ energy transfer and the back transfer （Yb^3＋ → Nd^3＋） are observed at room temperature. The fluorescence lifetime of the 4F3/2 level of Nd^3＋ in Nd,Yb：YVO4 is measured under 808 nm laser light excitation. The efficiency of Nd^3＋ → Yb^3＋ energy transfer in YVO4 is determined to be about 34%.

Yb^(3+):YVO_4晶体的生长及光谱性能研究

采用提拉法生长出光学质量优良的Yb3 + :YVO4晶体 ,研究生长过程中工艺参数的控制。测得掺杂浓度为18.1%Yb3 + :YVO4晶体中Yb3 + 离子的有效分凝系数Keff为 0 96。测定了不同Yb3 + 离子掺杂浓度晶体的吸收光谱和荧光光谱 ,并分别计算了不同掺杂浓度下Yb3 + :YVO4晶体的光谱参数。本文总结和解释了掺杂浓度影响其性能的规律 ,讨论了Yb3 + :YVO4晶体作为激光晶体的优点。