平行光栅对在刻线不平行时的色散研究

 利用三维空间光线追迹法，分析了啁啾脉冲放大系统中的压缩光栅对，在刻线不平行而光栅面平行时光的衍射特性。导出了此时光通过光栅对的群延时，数值计算了系统2阶和3阶色散量，以及这些色散量在光栅对严格平行时的相对误差。得出了中心波长光的接收位置相对于光栅对严格平行时的偏移量，并且分析了它与入射角的变化关系。

Research of dispersion on grating pairs in the case of unparallel grating grooves

This paper analyses the diffraction characteristics of grating pair compressor in a CPA(chirped pulse amplification) system, using the 3D ray-tracing method, under the conditions that the grating grooves are unparallel while the grating surfaces are parallel. In this case, the group delay of optical light passing through this system, the second and the third dispersion of the system and the relative errors of dispersion with the condition that the grating grooves is strictly parallel were calculated. The reception position's variation quantity of the central wavelength light on the reception surface was achieved, meanwhile, its variations with the incident angle varying were analysed.