位相调制三倍频激光束聚焦特性的衍射模型

Diffraction Model on Focusing Properties of Phase-modulated Third Harmonic Beams

基于三次谐波转换过程中位相扰动的传输变换 ,理论上研究了非线性晶体表面周期性纹波对三倍频激光束聚焦特性的影响 ,建立了多级衍射模型。该理论模型能解析地分析多级衍射峰的强度分布及角度分布 。

Based on the transform of phase aberrations in third harmonic generation, the focusing properties of third harmonic beam with nonlinear crystals having periodic surface ripples were theoretically investigated. A diffraction model has been developed, which can analytically calculate the intensity and angular distributions of multi-diffraction orders. It provides the design criteria for the third harmonic generation of high-energy laser drivers.