用于抑制串扰光链路的相干激光阵列中的高阶完美矢量光束

IF 3.6 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Bowang Shu, Yuqiu Zhang, Zhongquan Nie, Shiqing Tang, Jinyong Leng, Pu Zhou
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引用次数: 0

摘要

相干波束组合(CBC)由于其多功能的集成功能和先进的合成能力,为实现大容量和高带宽自由空间光通信提供了一种无与伦比的方法。然而,现有的CBC技术主要集中在相位工程上,在相位工程中容易涉及到不同模式之间的串扰,从而导致基于当前相干激光阵列(CLAs)的FSO链路中存在非平凡的串扰。为了解决这一挑战,我们提出了一种通过非正交极化复用实现串扰减少的编码方法。这是通过通过精心设计的cla结构利用同心排列的高阶完美矢量光束(pvb)来实现的。此外,可实现的任意高阶pvb为高维编码范式的建立提供了强有力的支持。作为概念演示,我们举例说明了零误码率“NUDT”的信息传输情况,表明极化控制CLA在抑制多通道间串扰方面具有优势。与同轴发射涡旋光束中出现的相位耦合相比,观测到的PVBs显示出完全独立的稳定发射路径。因此,在CLA系统中对高阶矢量光束的操作有望不断提高光链路的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Steering high-order perfect vector beams in coherent laser arrays for suppressive crosstalk optical links
Coherent beam combining (CBC) has offered an unparalleled approach in achieving high-capacity and high-bandwidth free-space optical (FSO) communication due to its versatile integration functionality and advanced synthetic ability. However, the existing CBC technologies focus primarily on the phase engineering, where crosstalk between different modes is easily involved, thus leading to nontrivial crosstalk in FSO links based on current coherent laser arrays (CLAs). To address this challenge, we propose an encoding method that enables crosstalk reduction via nonorthogonal polarization multiplexing. This is achieved by leveraging concentrically arranged high-order perfect vector beams (PVBs) via well-designed structure of the CLAs. Moreover, the achievable arbitrary high-order PVBs could strongly support the establishment of high-dimensional encoding paradigm. As a conceptual demonstration, we illustrate information transfer case of “NUDT” with zero bit error rate, indicating that the polarization controlled CLA is advantageous in suppressive crosstalk between multi-channels. Compared to phase coupling appearing in coaxial transmitting vortex beams, the observed PVBs display completely independent stable transmitting paths. Therefore, the manipulation of high-order vector beams within the CLA system is hopefully continuously improving the performances of optical links.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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