The analysis of the third harmonic generation schemes for ICF drivers
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摘要: 用数值计算方法对适用于ICF驱动器的Ⅰ/Ⅱ角度失谐和Ⅱ/Ⅱ偏振失配(在5.0GW/cm2附近获得最佳三倍频转换效率)两种三倍频方案进行了详细地对比分析,还给出了基频光脉冲空间分布均匀和空间分布为六阶超高斯,时间分布均为高斯(脉宽1ns),入射功率密度范围为0～10GW/cm2时的三倍频效率曲线,对ICF三倍频实验具有很重要的参考价值。Abstract: In this paper, using numerical calculation,we analyzed the type Ⅰ/type Ⅱ angle detuning and type Ⅱ/type Ⅱ polarization mismatching third harmonic generation (THG) scheme,and gave the tripling frequency transferring efficiency curves.Meanwhile the laser pulse shape of the fundamental beam is flat in space and Gaussian in time,or extra Gaussian (sixth order) in space and Gaussian in time.With the variation of input intensity from 0 to 10GW/cm2, the tripling transfer efficiency changed,and at the point of 5GW/cm2 the optimum tripling efficiency obtained.This paper has the important reference value to THG experiments for ICF.
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