对790 nm激光二极管泵浦Nd-La共掺和Nd-Sc共掺CaF2无序晶体激光器的特性进行了研究, 比较了掺杂不同浓度La3+和Sc3+的Nd∶CaF2晶体的吸收光谱和输出激光特性.在5 W泵浦功率下, 将0.5 at.% Nd3+与5 at.% La3+∶CaF2, 0.5 at.% Nd3+与3 at.% Sc3+∶CaF2掺杂, 分别获得1.10 W和0.64 W的连续激光输出, 斜效率分别为23.0%和12.8%, 阈值泵浦功率仅为10 mW.实验结果表明, Nd-La共掺和Nd-Sc共掺的CaF2晶体是一种可用于二极管泵浦且可获得高功率高效率激光输出的激光介质.

The laser characteristics of the Nd-La∶CaF2 and Nd-Sc∶CaF2 co-doping disordered crystals pumped by a 790 nm laser diode were studied. Absorption spectrum and lasing performances of Nd: CaF2 crystal with different La3+-Sc3+ doping concentration were studied respectively. Under the pump power of 5 W, the laser power of 1.10 W and 0.64 W are obtained with the co-doping of 0.5 at.% Nd3+, 5 at.% La3+∶CaF2, 0.5 at.% Nd3+and 3 at.% Sc3+∶CaF2 respectively, corresponding to the slope efficiencies of 23.0% and 12.8% respectively. The laser threshold for both crystals is as low as 10 mW. The results show that the new co-doped crystals are promising laser mediums for high power and high efficiency diode pumped solid-state lasers.