Propagation of orbital angular momentum modes carried by hollow vortex Gaussian beams in anisotropic atmospheric turbulence

Hu, Zonghua; Liu, Huilong; Xia, Jianling; He, Aga; Du, Zhenhua; Li, Yuzhao; Li, Zeyu; Chen, Tingting; Li, Hongbo; Lu, Yijun

doi:10.1364/josaa.396860

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…It has great potential for wireless optical communication [28,29]. In atmosphere turbulence [48], hyper-Gaussian beams [48,49] are purposed to work strongly through moderate to strong anisotropic conditions. Anisotropy is present in the atmosphere with a layer up to 25 km or in high altitude of the stratosphere.…”

Section: Different Vortexmentioning

confidence: 99%

Orbital Angular Momentum Wave Generation and Multiplexing: Experiments and Analysis Using Classical and Quantum Optics

Khulbe

Parthasarathy

2022

Wireless Communications and Mobile Computing

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Optical fiber communication is known as the backbone of communication today for voice, video, and data transmission. Recent advancements in optical technologies are leading us to many new forms of generation of orbital angular momentum (OAM) waves and its transmission technologies. Among them are hypergeometric waveform (HG), Bessel’s waveforms, Laguerre Gaussian waveforms, and other forms of OAMs. This mode of communication is by the twisted form of electromagnetic wave which can accommodate a larger number of channels making communication simpler for wired and wireless communication. In this paper, various methods of OAM waveform generation are presented and are compared in details discussing the various needs in communication. OAM multiplexing is done by spatial division multiplexing (SDM) and wavelength division multiplexing (WDM). Methods of OAM communication, generation techniques, power analysis, and bit error analysis prove efficient transmission capability of OAM waves using low power consumption and low bit error rate in optical communication networks. OAM from fiber can be directly communicated to atmosphere which is found very useful for short distance wireless communication. Experimental validation is discussed for HG, Bessel’s waveforms, and LG waveforms. Pure Optical Vertices (OV) are generated by VCSELs (vertical cavity surface emitting lasers) and transmitted by (MMF) multimode fibers. Various atmospheric effects and challenges are also elaborated in this paper. RSoft OptSim software is used for simulation.

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Section: Different Vortexmentioning

confidence: 99%

Orbital Angular Momentum Wave Generation and Multiplexing: Experiments and Analysis Using Classical and Quantum Optics

Khulbe

Parthasarathy

2022

Wireless Communications and Mobile Computing

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“…Usually, the beam order l of the HVGB is assumed to be even while the topological charge p may be even and odd, e.g. [24,[32][33][34][35][36][37][38]. However, as a special case of the HVGB with = l p, the ⁎ TEM l 0 doughnut hollow beam may have odd beam orders [30,[39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Hollow vortex Gaussian beam expressed in terms of cylindrical wave

Zhong,

Lin,

Shen

2024

J. Phys. Commun.

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The electrical field of hollow vortex Gaussian beam (HVGB) with an arbitrary combination of the beam order and topological charge is formulated by using the cylindrical wave spectrum representation (CWSR), which satisfies Maxwell’s equations rigorously and allows to study analytically and numerically the evolution of the beam along its propagation in the source region and the near/far- field regions. It is found that in the source region there exists a sharp and very narrow peak, due to the contribution of evanescent waves when the beam order and the topological charge satisfy specific relations. The effect of the spiral phase plate (SPP) in generating a non-vortex Gaussian beam to a vortex one is explained. Besides, it is found that the divergence of the beam is mainly determined by the topological charge and the hollow structure is mainly determined by the beam order.

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Divergence features of laser beams with angular momentum

Niziev¹,

Nesterov-Mueller²

2021

Quantum Electron.

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The physical features of the divergence of laser beams with angular momentum are investigated. The beams are presented in the form of a coherent superposition of two modes without angular momentum. Analytical formulas are used that satisfy Maxwell's equations for all components of the electric and magnetic fields of the initial modes. This allows one to describe the superposition of modes in terms of the components of the Umov–Poynting vector. The relationship between the beam divergence and its angular momentum, caused by the dependence of the radial and azimuthal components of the Umov–Poynting vector on the longitudinal components of the fields, is demonstrated. The components of this vector are analysed for an annular beam obtained using the superposition of azimuthally and radially polarised modes at various phase shifts between them. According to the analysis, beams with angular momentum can propagate without divergence. A method for generating such beams is discussed.

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Propagation of orbital angular momentum modes carried by hollow vortex Gaussian beams in anisotropic atmospheric turbulence

Cited by 3 publications

References 31 publications

Orbital Angular Momentum Wave Generation and Multiplexing: Experiments and Analysis Using Classical and Quantum Optics

Orbital Angular Momentum Wave Generation and Multiplexing: Experiments and Analysis Using Classical and Quantum Optics

Hollow vortex Gaussian beam expressed in terms of cylindrical wave

Divergence features of laser beams with angular momentum

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