A novel configuration of a low-aberration single diffraction grating stretcher for femtosecond chirped-pulse amplification lasers is proposed. The stretcher configuration employs two identical concave parabolic mirrors separated by a distance equal to their focal length. Using the numerical ray-tracing approach, the proposed design is compared with conventional Martinez and Öffner configurations in terms of high-order dispersions, aberrations of the spectral phase, and angular chirp. Although the proposed design is not completely aberration-free, it can exhibit comparable or lower aberrations than those of the single-grating Öffner configuration with similar parameters.

提出了一种用于飞秒chi脉冲放大激光器的低像差单衍射光栅扩展器的新型配置。拉伸器配置采用两个相同的凹抛物镜，其距离等于其焦距。使用数值射线追踪方法，将所提出的设计与常规Martinez和Öffner配置在高阶色散，光谱相位像差和angular角度方面进行了比较。尽管建议的设计并非完全没有像差，但与具有相似参数的单光栅Öffner配置的像差相比，它可以表现出可比或更低的像差。