Flattened light beams with an axial shadow generated through superposing cosh-Gaussian beams

被引：17
|
作者：
Zhu, KC [1 ]
Tang, HQ
Wang, XW
Liu, TN
机构：
[1] Cent S Univ, Dept Appl Phys & Heat Engn, Changsha 410083, Peoples R China
[2] Xiangtan Normal Univ, Dept Phys, Xiangtan 411201, Peoples R China
来源：
OPTIK | 2002年 / 113卷 / 05期
关键词：
flat-top beam; cosh-Gaussian beam; super-position principle; beam propagation factor; kurtosis parameter;
D O I：
10.1078/0030-4026-00149
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Making use of combining N - L + 1 cosh-Gaussian beams, the beams with nearly flattened top profiles and an on-axial shadow are introduced. An analytical expression of the beams propagating through a first-order ABCD system is derived. The closed expression of the beam propagation factor (M-2-factor) is presented to characterize the quality of the beams, and the kurtosis parameter is employed to describe the sharpness of such beams. Additionally, the scheme to generate such a fight beam is also proposed.
引用
收藏
页码：222 / 226
页数：5
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