Configuration optimization of off-axis parabolic mirror for enhancing the focusability of a laser beam  

作　　者：Xiahui Zeng 曾夏辉(Department of Physics&Electronic Information Engineering,Minjiang University,Fuzhou 350108,China)

机构地区：[1]Department of Physics&Electronic Information Engineering,Minjiang University,Fuzhou 350108,China

出　　处：《Chinese Optics Letters》2021年第3期80-85,共6页中国光学快报（英文版）

基　　金：supported by the Science Foundation for the Youth Scholars of Minjiang University (No. Mj9n201602);the National Science and Technology Major Project of the Ministry of Science and Technology of China。

摘　　要：We demonstrate a configuration optimization process of an off-axis parabolic mirror to maximize the focused peak intensity based on a precise knowledge of the tight focusing properties by using a full vector-diffraction theory and obtain an optimum configuration scaling rule, which makes it possible to achieve the maximum peak intensity. In addition, we also carry out an assessment analysis of the offset and off-axis angle tolerances corresponding to a 5% drop of the maximum focused peak intensity and present scaling laws for the tolerances of the offset and off-axis angle. Understanding these scaling laws is important to enhance the focusability of a laser beam by an off-axis parabolic mirror in the optimum configuration, in particular, which is valuable for structural design and selection of an off-axis parabolic mirror in ultrashort and ultraintense laser–matter interaction experiments.

关 键 词：off-axis parabolic mirror laser focusing vector-diffraction theory configuration optimization 

分 类 号：O43[机械工程—光学工程]