Analysis of electromagnetic vortex beams using modified dynamic mode decomposition in spatial angular domain

Yanming Zhang; Menglin L.N. Chen; Li Jun Jiang

doi:10.1364/OE.27.027702

Analysis of electromagnetic vortex beams using modified dynamic mode decomposition in spatial angular domain

Yanming Zhang, Menglin L.N. Chen, Li Jun Jiang

Research output: Journal article publication › Journal article › Academic research › peer-review

22 Citations (Scopus)

Abstract

The orbital angular momentum (OAM) modes of electromagnetic (EM) beams are utilized for multiplexing in communication systems, where each OAM mode is encoded with data. The OAM index, or the so-called topological charge, identifies each OAM mode. Recently, the amplitude of OAM mode has also been used as another modulation format. Therefore, accurate extraction of not only the OAM index but also the corresponding amplitude is required. In this paper, a modified dynamic mode decomposition (DMD) algorithm is proposed to analyze the OAM modes. We show that accurate topological charges and high-resolution amplitude patterns of both single OAM mode and composite OAM modes can be obtained. This work offers an effective approach for demultiplexing OAM-carrying beams, especially when the high-resolution amplitude information is needed.

Original language	English
Pages (from-to)	27702-27711
Number of pages	10
Journal	Optics Express
Volume	27
Issue number	20
DOIs	https://doi.org/10.1364/OE.27.027702
Publication status	Published - 30 Sept 2019
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.27.027702

Cite this

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title = "Analysis of electromagnetic vortex beams using modified dynamic mode decomposition in spatial angular domain",

abstract = "The orbital angular momentum (OAM) modes of electromagnetic (EM) beams are utilized for multiplexing in communication systems, where each OAM mode is encoded with data. The OAM index, or the so-called topological charge, identifies each OAM mode. Recently, the amplitude of OAM mode has also been used as another modulation format. Therefore, accurate extraction of not only the OAM index but also the corresponding amplitude is required. In this paper, a modified dynamic mode decomposition (DMD) algorithm is proposed to analyze the OAM modes. We show that accurate topological charges and high-resolution amplitude patterns of both single OAM mode and composite OAM modes can be obtained. This work offers an effective approach for demultiplexing OAM-carrying beams, especially when the high-resolution amplitude information is needed.",

author = "Yanming Zhang and Chen, {Menglin L.N.} and Jiang, {Li Jun}",

note = "Funding Information: National Natural Science Foundation of China (61271158); University of Hong Kong (201711159228); Research Grants Council, University Grants Committee (17209918); Asian Office of Aerospace Research and Development (FA2386-17-1-0010). Publisher Copyright: {\textcopyright} 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.",

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doi = "10.1364/OE.27.027702",

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T1 - Analysis of electromagnetic vortex beams using modified dynamic mode decomposition in spatial angular domain

AU - Zhang, Yanming

AU - Chen, Menglin L.N.

AU - Jiang, Li Jun

N1 - Funding Information: National Natural Science Foundation of China (61271158); University of Hong Kong (201711159228); Research Grants Council, University Grants Committee (17209918); Asian Office of Aerospace Research and Development (FA2386-17-1-0010). Publisher Copyright: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

PY - 2019/9/30

Y1 - 2019/9/30

N2 - The orbital angular momentum (OAM) modes of electromagnetic (EM) beams are utilized for multiplexing in communication systems, where each OAM mode is encoded with data. The OAM index, or the so-called topological charge, identifies each OAM mode. Recently, the amplitude of OAM mode has also been used as another modulation format. Therefore, accurate extraction of not only the OAM index but also the corresponding amplitude is required. In this paper, a modified dynamic mode decomposition (DMD) algorithm is proposed to analyze the OAM modes. We show that accurate topological charges and high-resolution amplitude patterns of both single OAM mode and composite OAM modes can be obtained. This work offers an effective approach for demultiplexing OAM-carrying beams, especially when the high-resolution amplitude information is needed.

AB - The orbital angular momentum (OAM) modes of electromagnetic (EM) beams are utilized for multiplexing in communication systems, where each OAM mode is encoded with data. The OAM index, or the so-called topological charge, identifies each OAM mode. Recently, the amplitude of OAM mode has also been used as another modulation format. Therefore, accurate extraction of not only the OAM index but also the corresponding amplitude is required. In this paper, a modified dynamic mode decomposition (DMD) algorithm is proposed to analyze the OAM modes. We show that accurate topological charges and high-resolution amplitude patterns of both single OAM mode and composite OAM modes can be obtained. This work offers an effective approach for demultiplexing OAM-carrying beams, especially when the high-resolution amplitude information is needed.

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Analysis of electromagnetic vortex beams using modified dynamic mode decomposition in spatial angular domain

Abstract

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