中文摘要：

探讨了脉冲储能型重复频率片状Yb：YAG激光放大器抽运过程中的自发辐射放大（ASE）效应和能量提取过程.在Yb3＋离子抽运动力学的基础上,建立了抽运过程中的自发辐射放大模型,计算了Yb：YAG晶体中三维含时储能密度分布和全片可提取能量.讨论了不同介质尺寸、掺杂浓度及厚度、介质温度参数下,自发辐射放大对储能的影响.给出了较为优化的设计,将有助于基于Yb激光材料的大能量二极管抽运的固体激光器设计.

英文摘要：

Based on the energy-level structure of quasi-three-level Yb ion, an amplified spontaneous emission（ASE） model in pumping process is set up. The stored energy density distribution and the energy that can be extracted in Yb：YAG crystal are calculated. The effect of ASE on energy-storage is investigated specifically, which includes the aperture, doping concentration and thickness, and working temperature of the gain medium. This paper gives an optimizing design of a pulsed energy-storage reprated Yb：YAG disk laser amplifier, which will be helpful in designing high-energy diode-pumped solid-state lasers based on Ybdoped materials.