【摘要】 考虑到激光腔模中光腰的频率依赖性 ,得到了超短脉冲高斯光束经消色差透镜聚焦后光场的解析形式 ,并讨论了此时透镜群速度色散对光束聚焦性质的影响。分析了单透镜色差和群速度色散对超短脉冲高斯光束聚焦的时间分布及脉冲波面的影响 ;比较了消色差透镜及单透镜中脉冲初始光腰尺寸对聚焦的影响。更多还原

【Abstract】 Considering the wave number dependence of the waist size in laser resonator, the exact intensity solution of the pulse through achromat is obtained. The effect of group velocity dispersion (GVD) on the focus was discussed. The influence of lens dispersion up to second order on the spatial and temporal intensity distribution of the femtosecond Gaussian beam was analyzed. The influence of input beam size on the maximum intensity in the focus of singlet lens and achromat was compared.更多还原