相位倾斜H-G光束的焦开关现象  

Focal switch phenomena of tilted phase Hermite-Gaussian beams

作　　者：周彩玉[1] 陶向阳[2] 

机构地区：[1]莆田学院电子信息工程系,福建莆田351100 [2]江西师范大学理电学院,江西南昌330022

出　　处：《山东理工大学学报（自然科学版）》2009年第3期47-50,共4页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：研究了相位倾斜H-G光束通过光阑-透镜分离系统的焦开关现象.基于Collins公式,解析地推导出相位倾斜H-G光束的轴上场分布的递推公式,着重研究相位倾斜对焦开关现象的影响.研究表明,相位倾斜影响了相对焦移量和相对跃变量,但不影响焦开关发生的位置.另外,当相位倾斜畸变较小时,截断参数在cαmin≤α≤αcmax内取值,有焦开关现象产生;研究还发现相位倾斜畸变在一定范围时,产生焦开关现象的截断参数取值范围可以只有下限没有上限.The focal switch phenomenon of a tilted phase H-G beam passing through a system with the aperture and lens separated was investigated theoretically. Recurrence equations for the axial irradiance of tilted phase H-G beams were derived from the Collins formula. The influence of tilted phase on the behavior of the focal switch was also studied. The results demonstrate that the tilted phase affects the relative shift and the transition height rather than the turning point. The focal switch phenomenon was also observed when the truncation parameter is within the region of cαmin≤α≤αcmax for small tilted phase aberration. Only a critical minimum truncation parameter may exist when the tilted phase aberration is within a certain range.

关 键 词：倾斜畸变厄米-高斯光束 相位倾斜系数 光阑-透镜分离系统 焦移 焦开关 

分 类 号：O436[机械工程—光学工程]