共掺Na^＋的Yb^3＋：CaF2晶体的荧光分析与低阈值激光运转

基于975nm激发的室温下荧光光谱测量，系统地研究了在新型钠、镱共掺的氟化钙晶体中钠离子的作用机理，分析了掺钠离子浓度与激光阈值的关系，获得了具有最低激光阈值的掺杂浓度优化配比．激光实验表明对于2％Yb^3＋离子浓度的氟化钙，掺入3％的钠离子能够获得最低阈值的激光运转，这与理论和荧光分析完全一致．

Basing on measuring the luminescence spectra at room temperature pumped by 975 nm light, the action mechanism of Na+ in the novel Yb3+, Na+ : CaF2 crystal was systemically investigated. The relation between the concentration of doping Na+ and the laser operation threshold was analyzed. The optimum match concentration for Yb3+, Na+: CaF2 with low laser threshold was btained. In the experiment, the lowest laser operation threshold at only 70 mW of absorbing pumped power for 2% Yb3+ 3% Na+ : CaF2 crystal is realized, which is in good agreement with the analysis of luminescence properties.