High-dimensional Orbital Angular Momentum Communication of Perfect Vortex Beam Based on Demultiplexing of Microlens Array with sector sub-aperture

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-03-27 DOI:10.1016/j.optcom.2025.131762

Fan Wu , Ao Tang , Zhijie Pan, Feng Shen

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引用次数: 0

Abstract

The Perfect Vortex Beam (PVB) exhibits a consistent ring radius across different Orbital Angular Momentum (OAM) modes, this unique characteristic endows the PVB has excellent application prospects in the free-space optical communication field, etc. In this paper, we experimentally demonstrate a high-dimensional OAM communication method using PVB for encoding, and demultiplexing via a microlens array with sector sub-aperture(MLA-S). At the transmitter, multiple PVB with different radii and modes are superimposed to achieve high-dimensional information encoding. At the receiver, an MLA-S is employed for decoding, which the circularly symmetric structure effectively matches the helical phase. This device can simultaneously measure multiple OAM modes at different spatial positions. And compared to using only the OAM modulation, this method can encode more information by utilizing fewer modes. Meanwhile, the OAM decoding device has high measurement accuracy, and a large measurement range without complex image processing. Therefore, this work has promising applications in high-capacity spatial optical communication and mode recognition.

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基于扇形子孔径微透镜阵列解复用的完美涡旋光束高维轨道角动量通信

完美涡旋光束（PVB）在不同轨道角动量（OAM）模式下具有一致的环半径，这一独特的特性使其在自由空间光通信等领域具有良好的应用前景。在本文中，我们实验演示了一种高维OAM通信方法，该方法使用PVB进行编码，并通过具有扇形子孔径（MLA-S）的微透镜阵列进行解复用。在发射端，将多个不同半径和模式的PVB叠加，实现高维信息编码。在接收端，采用MLA-S进行解码，其圆对称结构有效匹配螺旋相位。该装置可以同时测量不同空间位置的多个OAM模式。与仅使用OAM调制相比，该方法可以用更少的模式编码更多的信息。同时，OAM解码装置测量精度高，测量范围大，无需进行复杂的图像处理。因此，这项工作在大容量空间光通信和模式识别方面具有广阔的应用前景。

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

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.