Non-diffracting speckles of a perfect vortex beam

被引：35

作者：

Reddy, Salla Gangi ^{[1
]}

Chithrabhanu, P. ^{[1
]}

Vaity, Pravin ^{[2
]}

Aadhi, A. ^{[1
]}

Prabhakar, Shashi ^{[1
,3
,4
]}

Singh, R. P. ^{[1
]}

机构：

[1] Phys Res Lab, Ahmadabad 380009, Gujarat, India

[2] Univ Laval, Ctr Opt Photon & Lasers, Quebec City, PQ, Canada

[3] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[4] CSIR, Natl Laser Ctr, POB 395, ZA-0001 Pretoria, South Africa

来源：

JOURNAL OF OPTICS | 2016年 / 18卷 / 05期

关键词：

speckles; perfect optical vortices; diffraction-free; statistical optics; OPTICAL VORTICES; GENERATION;

D O I：

10.1088/2040-8978/18/5/055602

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We generate perfect optical vortex (POV) beams, whose intensity distribution is independent of the order, and scatter them through a rough surface. We show that the size of produced speckles is independent of the order of the POV and their Fourier transform gives the random non-diffracting fields. The invariant size of speckles over the free space propagation verifies their non-diffracting or non-diverging nature. The size of speckles can be easily controlled by changing the axicon parameter, used to generate the Bessel-Gauss beams whose Fourier transform provides the POV. These results may be useful in applications of POV for authentication in cryptography.

引用

页数：7

共 29 条

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