摘要
针对光栅对压缩器刻线平行性失调会对压缩器色散特性造成严重影响这一问题,对刻线不平行的光栅对压缩器的衍射特性进行了分析,推导出了脉冲光束通过光栅对的光程。数值计算了2阶、3阶和4阶色散量,以及与光栅对严格平行相比的色散差。计算了输出脉冲的垂直谱位移,并将其作为刻线夹角的函数进行了分析。结果表明,存在刻线失调时,低刻线密度的光栅具有更好的优越性。
The groove misalignment of the grating-pair compresor does affect its dispersion characteristics. The diffraction characteristics of grating-pair compressor is analyzed under the condition that the gating surfaces are parallel while the grating grooves are unparallel,and the optical path length of pulse passing through this system is derived. Then the second-order, thirdorder and fourth-order dispersions are calculated. The resulting relative dispersion errors compared with that the grating grooves are strictly parallel are shown. The vertical spectrum displacement in the output pulse is calculated and shown quantitatively as function of the angle between the grooves. The results show that gratings with low groove density are superior to that of high density ones, if the groove misalignment is unavoidable.
出处
《激光技术》
CAS
CSCD
北大核心
2006年第3期334-336,共3页
Laser Technology
基金
中国工程物理研究院科学技术基金(20030436)
国家八六三高科技项目基金(2005AA845050)联合资助项目
关键词
衍射光栅
垂直谱位移
啁啾脉冲放大
刻线失调
diffraction gratings
vertical spectrum displacement
chirped pulse amplification
groove misalignment
