热键合技术的Cr4+:YAG被动调Q激光器理论和实验研究

 采用数值求解被动调Q速率方程，并讨论了基于热键合技术被动调Q激光器的优化方法。通过数值仿真讨论分析了谐振腔的损耗、饱和吸收体的初始透过率、输出镜的反射率和泵浦功率等参数对激光输出的影响。结果表明：输出镜存在最佳透过率，使得输出功率最高和脉冲能量最大；减小饱和吸收体的初始透过率能有效提高脉冲能量，并压缩脉宽，但是会增加阈值泵浦功率；泵浦功率与脉冲重复率和输出功率近似成线性增加，增大泵浦功率可以压缩脉宽。并通过实验验证了理论分析的正确性。

Theoretic study and experiments thermally bonded Cr4+: YAG passively Q-switched lasers

Rate equations of passively Q-switched lasers were numerically calculated.The optimization of thermally bonded passively Q-switched lasers was discussed.The effect of key parameters of passively Q-switched lasers such as the initial transmission of the saturable absorber,the reflection of the output mirror,the pump power was got by numerical simulation.Output mirror transmission can be optimized to get the maximized output power and pulse energy.Decreasing initial transmission of the saturable absorber can cause pulse energy increase,pulse duration decrease and the threshold pump power increase respectively.The repeat rate and output power increase with pump power approximately linearly,and can shorten the pulse duration while increase the pump power.Theoretic calculation results have been demonstrated by experiments.