Propagation law and quasi-invariance properties of the truncated second-order moment of a diffracted laser beam

被引：42

作者：

Pare, C

Belanger, PA

机构：

[1] Equipe Laser et Optique Guidee, (COPL) Dept. de Physique, Université Laval, Sainte-Foy

来源：

OPTICS COMMUNICATIONS | 1996年 / 123卷 / 4-6期

关键词：

D O I：

10.1016/0030-4018(95)00443-2

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The propagation of the truncated second-order moment (i.e. integrated over a finite interval enclosing a constant fraction of the total power) of a diffracted beam is analyzed. An asymptotic analysis, supported by numerical simulations, shows that the propagation law becomes nearly perfectly parabolic as the power fraction increases. It is also demonstrated, on a general basis, that a parabolic propagation law implies the invariance of the infered beam-propagation factor.

引用

页码：679 / 693

页数：15