分析了传导冷却与端面抽运的Nd∶YAG板条激光器边缘畸变的形成原因, 并进行了抑制边缘畸变的实验研究。根据实验参数进行了数值模拟, 模拟结果与实验结果吻合。以液态环氧胶为导热材料对激光器板条侧面进行实时冷却, 可增加板条内部荧光从侧面逸出的能量比例, 从而减小放大自发辐射, 边缘畸变量峰谷值约减小50%。该方法有利于提高板条激光器的光束质量和输出功率。

The causation of edge distortion in conduction-cooled and end-pumped Nd∶YAG slab laser is analyzed and the experiment to suppress the slab edge distortion is conducted. The numerical simulation is done based on the experimental paramters indicating the result is consistent with the experimental one. The usage of the liquid epoxy-mucilage as heat conduction material to make a real-time cooling of the laser slab side can increase the energy ratio of fluorescence escaping from the laser slab side, which results in the reduction of the amplified spontaneous emission and the edge distortion peak-vallege value by 50%. This method possesses the advantage of enhancing the slab laser beam quality and output power.