Vortex beams with zero orbital angular momentum and non-zero topological charge

被引：35

作者：

Aksenov, V. P. ^{[1
]}

Dudorov, V. V. ^{[1
]}

Filimonov, G. A. ^{[1
]}

Kolosov, V. V. ^{[1
,2
]}

Venediktov, V. Yu. ^{[3
,4
]}

机构：

[1] Russian Acad Sci, VE Zuev Inst Atmospher Opt, Siberian Branch, Pl Akad Zueva 1, Tomsk 634055, Russia

[2] Russian Acad Sci, Siberian Branch, Tomsk Sci Ctr, Prosp Akad Skii 10-4, Tomsk 634055, Russia

[3] Electrotech Univ LETI, Laser Measurement & Nav Syst Dept, St Petersburg 197376, Russia

[4] St Petersburg State Univ, Quantum Elect Dept, Fac Phys, St Petersburg 198504, Russia

来源：

OPTICS AND LASER TECHNOLOGY | 2018年 / 104卷

关键词：

ATMOSPHERIC-TURBULENCE; PROPAGATION; LIGHT; ARRAY;

D O I：

10.1016/j.optlastec.2018.02.022

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the field structure of the vortex beam generated via coherent fiber-array where beamlets are arranged along a circle. Each beamlet is an aperture-bounded Gaussian beam emerging from fiber output with constant phase. The phase shift between neighbor beamlets is the same, and the total phase incursion along the circle is equal to 2 pi l(l is integer). The total orbital angular momentum of the beam is equal to zero for any propagation distance and arbitrary I. We show that the central part of the far field corresponds to an optical vortex with the orbital angular momentum and the topological charge equal to l(l < N/3, N is the number of beamlets). The dependencies of the orbital angular momentum of the vortex beam on the receiving aperture size and the propagation distance are analyzed. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：159 / 163

页数：5

共 27 条

[1] Properties of vortex beams formed by an array of fibre lasers and their propagation in a turbulent atmosphere [J].