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基于Yb3+抽运动力学,结合光线追迹的方法,建立了抽运过程中的放大自发辐射模型,得到激光介质中三维含时储能分布.将速率方程理论和角谱传播理论结合,对谐振腔内调Q脉冲的形成、传播过程进行建模计算,得到激光脉冲的时间-空间分布和光束质量因子变化规律.同时进行了激光二极管抽运重频Yb:YAG片状激光器电光调Q实验,并与模拟计算的结果进行了对比校核,印证了计算模型的正确性.这为主动调Q固体激光器的设计提供了参考.
Based on the Yb3 + pumping kinetics and combined with ray tracing method, an amplified spontaneous emission model during pumping is established to obtain the three-dimensional time-dependent energy storage distribution in the laser medium. Combining the theory of velocity equation and the theory of angular spectrum propagation, The formation and propagation of the internal Q-pulse are modeled and calculated, and the time-space distribution of the laser pulse and the variation rule of the beam quality factor are obtained.At the same time, the electro-optic Q-switched Q-switched laser Yb: YAG chip laser Compared with the simulation results, the correctness of the calculation model is verified, which provides a reference for the design of active Q-switched solid state laser.