共掺Na^+的Yb^(3+)∶CaF_2晶体的荧光分析与低阈值激光运转

Luminescence properties of Yb^(3+)/Na^+ codoped CaF_2 crystal and laser operation with low threshold

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%Yb3+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 Yb^3＋ , 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 Yb^3＋ , Na^＋ ： CaF2 with low laser threshold was obtained. In the experiment, the lowest laser operation threshold at only 70 mW of absorbing pumped power for 2% Yb^3＋ , 3 % Na^＋ ：CaF2 crystal is realized, which is in good agreement with the analysis of luminescence properties.