【摘要】 根据ffner展宽器的原理和设计,进行了光学参量啁啾脉冲放大系统中信号光脉冲展宽的实验研究。通过数值方法,合理地选择了展宽器光学元件的各项参数,即光栅常数为1 800(102 mm×102 mm),凹面镜曲率半径为1 000 mm,凸面镜与凹面镜之间的距离为653 mm,信号光入射角为51.05°。实验结果表明,优化后的ffner展宽器可以将脉宽为30 fs的信号光脉冲展宽到545 ps,展宽比为18 167,满足OPCPA放大的需要。更多还原

【Abstract】 According to the design and the principle of the ffner stretcher,the pulse stretcher for OPCPA laser system was experimentally investigated.Using the numerical method,the four key parameters were appropriately selected,that is the angle of incidence being 51.05°,the distance from grating to concave spherical mirror being 653 mm,the curvature radius of the concave spherical mirror being 1 000 mm and the grating constant being 1 800 lines/mm.The experimental results demonstrate that an expansion of 30 fs to 545 ps pulse and a stretching ratio of 18,167 can be obtained by adjusting the key parameters.更多还原