目前国际上超高功率超短脉冲激光系统,多采用固态增益介质和红外波段,基本实现了靶面的近衍射极限聚焦,通过研究紫外超短脉冲放大的聚焦性能,能进一步缩小焦斑尺寸和提高靶面功率密度,在同样的功率条件下获得更大的功率密度输出。通过对紫外超短脉冲放大系统进行分析发现,影响聚焦性能的主要有3个方面因素。 At present, ultra-high power ultra-short pulse laser systems in the world mostly use solid-state gain medium and infrared band to basically achieve the near-diffraction limit focusing of the target surface. By studying the focusing performance of ultra-short ultraviolet pulse amplification, the size of the focal spot can be further reduced Increase the power density of the target surface, in the same power conditions to obtain greater power density output. By analyzing the ultrashort UV pulse amplification system, it is found that there are mainly three factors that affect the focusing performance.