光学
旋涡
物理
涡流
自由空间光通信
光束
拓扑量子数
角动量
湍流
光通信
串扰
梁(结构)
经典力学
机械
量子力学
作者
Xu Yan,Lixin Guo,Mingjian Cheng,Jiangting Li
出处
期刊:Optics Express
[The Optical Society]
日期:2018-05-02
卷期号:26 (10): 12605-12605
被引量:65
摘要
Orbital angular momentum (OAM) mode crosstalk induced by atmospheric turbulence is a challenging phenomenon commonly occurring in OAM-based free-space optical (FSO) communication. Recent advances have facilitated new practicable methods using abruptly autofocusing light beams for weakening the turbulence effect on the FSO link. In this work, we show that a circular phase-locked Airy vortex beam array (AVBA) with sufficient elements has the inherent ability to form an abruptly autofocusing light beam carrying OAM, and its focusing properties can be controlled on demand by adjusting the topological charge values and locations of these vortices embedded in the array elements. The performance of a tailored Airy vortex beam array (TAVBA) through atmospheric turbulence is numerically studied. In a comparison with the ring Airy vortex beam (RAVB), the results indicate that TAVBA can be a superior light source for effectively reducing the intermodal crosstalk and vortex splitting, thus leading to improvement in the FSO system performance.
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