Focal shift of focused flat-topped beams

被引：62

作者：

Borghi, R

Santarsiero, M

Vicalvi, S

机构：

[1] Univ Roma Tre, Dipartimento Ingn Elettron, I-00146 Rome, Italy

[2] INFM, I-00146 Rome, Italy

[3] Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy

[4] Univ La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

来源：

OPTICS COMMUNICATIONS | 1998年 / 154卷 / 5-6期

关键词：

D O I：

10.1016/S0030-4018(98)00247-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The phenomenon of focal shift is studied for the case of focused coherent beams showing a flat-topped transverse profile. The model describing such beams is that of flattened Gaussian beams, which, due to their peculiar analytical expression, are particularly fit for the study of paraxial propagation of flattened beams. Focal shifts for the fundamental Gaussian mode and for the field produced by diffraction of a converging spherical wave by a circular aperture are shown to be obtainable by this model as particular cases. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：243 / 248

页数：6

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