实现了钛宝石泵浦Yb:YAG微片激光器的室温运转,Yb:YAG晶体中Yb3+的掺杂浓度分别为10 at-%和20 at-%,当20 at-% Yb:YAG晶体微片(6 mm×6 mm×0.5 mm)吸收的泵浦功率为784 mW时,获得356 mW 1.053 μm的CW激光输出,斜率效率高达69%,总的光-光效率为45%。

With different doping levels of Yb3+ in the Yb:YAG crystal, an efficient room-temperature Yb:YAG thin chip laser operating at 1.053 μm pumped by a Ti:sapphire laser was realized. For a 20 at-% Yb:YAG thin chip (6 mm×6 mm×0.5 mm), a 356 mW output power was obtained for an absorbed pump power of 784 mW, and an output coupler transmittivity of 4.26%, giving a slope efficiency of as high as 69% and an extrapolated threshold of 275 mW. The experimental set-up of the thin chip laser is described.