以Nd∶YAG透明陶瓷为增益介质, 搭建了一套激光性能评估系统, 研究了Nd∶YAG透明陶瓷的尺寸对激光性能的影响。实验结果表明, 当Nd∶YAG透明陶瓷的尺寸较小时, 在相同抽运功率下, 激光输出功率随着尺寸的增加而增大, 但增幅有所下降; 当Nd∶YAG透明陶瓷的尺寸为3 mm×3 mm×9 mm时, 获得了功率为4.94 W的连续激光输出, 相应的斜率效率为37.7%; 当抽运功率为17 W时, 激光输出功率随Nd∶YAG透明陶瓷尺寸变化的数值模拟结果与实验结果相吻合; 与Nd∶YAG单晶相比, Nd∶YAG透明陶瓷可通过提高掺杂浓度来提升激光性能。

With the Nd∶YAG transparent ceramics as the gain media, a laser property evaluation system is built. The effect of the Nd∶YAG transparent ceramic size on the laser property is studied. The experimental results show that, when the Nd∶YAG transparent ceramic size is relatively small, the laser output power increases with the increase of the size under the same pump power, but the increase amplitude declines. When the Nd∶YAG transparent ceramic size is 3 mm×3 mm×9 mm, the continuous laser output with a power of 4.94 W and a corresponding slope efficiency of 37.7% is obtained. When the pump power is 17 W, the numerical simulation results on the variation of the laser output power with the Nd∶YAG transparent ceramic size is consistent with the experimental results. Compared with the Nd∶YAG monocrystal, the Nd∶YAG transparent ceramics can be used to improve laser properties if its doping concentration is enhanced.