Interaction of Bessel optical vortices in quadratic nonlinear medium

被引：14

作者：

Stabinis, A ^{[1
]}

Orlov, S ^{[1
]}

Jarutis, V ^{[1
]}

机构：

[1] Vilnius State Univ, Dept Quantum Elect, LT-2040 Vilnius, Lithuania

来源：

OPTICS COMMUNICATIONS | 2001年 / 197卷 / 4-6期

关键词：

bessel beam; optical vortex; second harmonic generation;

D O I：

10.1016/S0030-4018(01)01388-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A vortical structure of second harmonic (SH) field excited in quadratic nonlinear medium by combined beam composed of two multiple-charged Bessel vortices of fundamental frequency (FF) is analyzed. An emergence of the pairs of single-charged vortices in SH beam caused by interaction of Bessel vortices is revealed. The charges of the vortices in these pairs can be the same (both positive), as well as different. We show, that in spite of any variation in the number of vortices in SH beam, the doubling of total topological charge of FF beam takes place in SH generation process. The derived results correspond to the negligible pump depletion in the case of exact noncritical phase matching and neglect of SH beam diffraction. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：419 / 429

页数：11

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