Information transmission through parallel multi-task-based recognition of high-resolution multiplexed orbital angular momentum

IF 6.5 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Frontiers of Physics Pub Date : 2024-04-22 DOI:10.1007/s11467-024-1402-y

Jingwen Zhou, Yaling Yin, Jihong Tang, Yong Xia, Jianping Yin

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Abstract

Orbital angular momentums (OAMs) greatly enhance the channel capacity in free-space optical communication. However, demodulation of superposed OAM to recognize them separately is always difficult, especially upon multiplexing more OAMs. In this work, we report a directly recognition of multiplexed fractional OAM modes, without separating them, at a resolution of 0.1 with high accuracy, using a multi-task deep learning (MTDL) model, which has not been reported before. Namely, two-mode, four-mode, and eight-mode superposed OAM beams, experimentally generated with a hologram carrying both phase and amplitude information, are well recognized by the suitable MTDL model. Two applications in information transmission are presented: the first is for 256-ary OAM shift keying via multiplexed fractional OAMs; the second is for OAM division multiplexed information transmission in an eightfold speed. The encouraging results will expand the capacity in future free-space optical communication.

Abstract Image

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通过基于并行多任务的高分辨率多路轨道角动量识别进行信息传输

轨道角动量（OAM）大大提高了自由空间光通信的信道容量。然而，解调叠加的 OAM 以分别识别它们总是很困难，尤其是在复用更多 OAM 时。在这项工作中，我们利用多任务深度学习（MTDL）模型，在 0.1 分辨率下直接识别复用的小数 OAM 模式，而无需将它们分开，识别准确率很高。也就是说，合适的 MTDL 模型能很好地识别实验生成的带有相位和振幅信息的全息图的双模、四模和八模叠加 OAM 光束。本文介绍了在信息传输中的两种应用：第一种是通过复用分数 OAM 进行 256ary OAM 移位键控；第二种是以八倍速度进行 OAM 分复用信息传输。这些令人鼓舞的结果将扩大未来自由空间光通信的容量。

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

Frontiers of Physics PHYSICS, MULTIDISCIPLINARY-

CiteScore

9.20

自引率

9.30%

发文量

898

审稿时长

6-12 weeks

期刊介绍： Frontiers of Physics is an international peer-reviewed journal dedicated to showcasing the latest advancements and significant progress in various research areas within the field of physics. The journal's scope is broad, covering a range of topics that include: Quantum computation and quantum information Atomic, molecular, and optical physics Condensed matter physics, material sciences, and interdisciplinary research Particle, nuclear physics, astrophysics, and cosmology The journal's mission is to highlight frontier achievements, hot topics, and cross-disciplinary points in physics, facilitating communication and idea exchange among physicists both in China and internationally. It serves as a platform for researchers to share their findings and insights, fostering collaboration and innovation across different areas of physics.