混合掺杂Cr^(4+),Yb:YAG晶体储能特性的数值模拟  

Numerical Simulation of Energy Storage in Cr^(4+),Yb:YAG Crystal Amplifier

作　　者：郑建刚[1] 严雄伟[1] 蒋新颖[1] 王振国[1] 段文涛[1] 李明中[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《中国激光》2011年第10期135-139,共5页Chinese Journal of Lasers

摘　　要：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。The energy storage in the Cr4＋,Yb：YAG crystal amplifier is stimulated under the conditions of atom fraction thickness product 15%·mm and pumping density 20 kW/cm2 for different apertures and doped Cr4＋ and Yb3＋ densities,using the pumping dynamic model for Cr4＋,Yb：YAG crystal amplifier.The results indicate that the density of energy storage decreases with the increasing of Yb3＋ and amplifier aperture in absence of Cr4＋;but the doped Cr4＋ in Yb：YAG crystal affects on the energy storage in the amplifier.In some cases the maximum energy storage in amplifier increases first,then decreases with the increasing of Cr4＋ density.Namely,for maximum energy storage there is an optimized Cr4＋ density,which is determined by the Yb3＋ density and aperture of amplifier.

关 键 词：材料 混合掺杂晶体 Cr4+ Yb:YAG晶体 数值模拟 储能特性 

分 类 号：TN248.1[电子电信—物理电子学]