The Propagation Characteristics of Circular Airy Beams with Propagational Fractional-Order Optical Vortices

IF 2.1 4区物理与天体物理 Q2 OPTICS

Photonics Pub Date : 2024-01-07 DOI:10.3390/photonics11010064

Guoliang Zheng, Lili Wan, Tiefeng He, Qingyang Wu, Xuhui Zhang

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引用次数: 0

Abstract

We investigate the propagation properties of circular Airy beams (CABs) with propagational fractional-order optical vortices (OVs). The superposition of the phase singularity and polarization singularity from a vortex vector beam (VVB) plays a significant role in creating a propagational fractional vortex beam. Propagational fractional vortex beams can be considered as a superposition of left and right circularly polarized vortex beams with different integer topological charges (TCs). We study the propagation characteristics of two kinds of propagational fractional vortex CABs, and the results show that both of the two kinds of beams can stably propagate in free space, and they exhibit an “abruptly auto-focusing” property and “self-healing” property during the propagation. The intensity distribution of the first kind of propagational fractional vortex CAB has an odd number of petals (2m + 1), while the second kind of beam has a crescent-shaped intensity distribution. The influence of turbulence on the beam propagation through atmosphere under different turbulence strengths is also numerically studied in this paper. A fractional vortex CAB with an initial radius r0 = 10 mm can retain its shape after propagating 20 m when the atmospheric refractive-index structure constant CN2=0.2×10−12m−2/3. Our results are expected to broaden the application of CABs.

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带有传播分序光涡的圆形空气光束的传播特性

我们研究了带有传播分数阶光涡旋（OV）的圆艾里光束（CAB）的传播特性。涡旋矢量光束（VVB）的相位奇异性和偏振奇异性的叠加在形成传播分数涡旋光束中起着重要作用。传播分数涡旋束可以看作是具有不同整数拓扑电荷（TC）的左右圆极化涡旋束的叠加。我们研究了两种传播型分数涡旋 CAB 的传播特性，结果表明这两种光束都能在自由空间中稳定传播，并且在传播过程中表现出 "突然自动聚焦 "特性和 "自愈 "特性。第一种传播分涡 CAB 的强度分布为奇数瓣（2m + 1），而第二种光束的强度分布为月牙形。本文还对不同湍流强度下湍流对光束在大气中传播的影响进行了数值研究。当大气折射率结构常数 CN2=0.2×10-12m-2/3 时，初始半径为 r0 = 10 mm 的分涡 CAB 在传播 20 m 后仍能保持其形状。我们的研究结果有望拓宽 CAB 的应用范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Photonics Physics and Astronomy-Instrumentation

CiteScore

2.60

自引率

20.80%

发文量

817

审稿时长

8 weeks

期刊介绍： Photonics (ISSN 2304-6732) aims at a fast turn around time for peer-reviewing manuscripts and producing accepted articles. The online-only and open access nature of the journal will allow for a speedy and wide circulation of your research as well as review articles. We aim at establishing Photonics as a leading venue for publishing high impact fundamental research but also applications of optics and photonics. The journal particularly welcomes both theoretical (simulation) and experimental research. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.