借助于Cr4+,Yb:YAG激光放大器抽运动力学模型,在浓度(原子数分数)厚度(mm)积为15%.mm、抽运功率密度为20 kW/cm2的情况下,对不同口径、不同掺杂浓度的Cr4+,Yb:YAG晶体放大器中的储能进行了模拟计算。计算表明,在不掺入Cr4+的Yb:YAG晶体中,随着Yb3+浓度的增加(横向尺寸不变)和横向尺寸的增加(浓度不变),最终获得的储能密度反而减小。但在混合掺入Cr4+后,放大器中的储能将受到Cr4+浓度的影响,在Yb3+的浓度和横向尺寸一定情况下,放大器中的最大储能随Cr4+的增加将先增加,后减小,即:在一定情况下,为了获得放大器中最大的储能,掺入的Cr4+离子浓度有一优化值,这一优化值将由Yb3+离子浓度和介质的横向尺寸确定。 With the pumping kinetic model of Cr4 +, Yb: YAG laser amplifier, the laser beam with different caliber and different thickness was obtained under the condition of the concentration (atomic fraction) of thickness (mm) of 15% .mm and the pumping power density of 20 kW / Doping concentrations of Cr4 +, Yb: YAG crystal amplifier in the energy storage were simulated. The calculated results show that with the increase of Yb3 + concentration (unchanged in the transverse direction) and the increase of the transverse dimension (unchanged in concentration) in the Yb: YAG crystals without Cr4 +, the energy density obtained finally decreases. However, when mixed and mixed with Cr4 +, the energy stored in the amplifier will be affected by the Cr4 + concentration. Under certain Yb3 + concentration and lateral size, the maximum energy storage in the amplifier will increase first and then decrease with the increase of Cr4 + : In some cases, there is an optimized value for the concentration of Cr4 + ions incorporated in order to obtain the maximum stored energy in the amplifier, which optimization value will be determined by the Yb3 + ion concentration and the transverse dimension of the medium.