Carrying Data on the Orbital Angular Momentum of Light

Rusch, Leslie A.; Rad, M.M.; Allahverdyan, Karen; Fazal, Irfan; Bernier, Éric

doi:10.1109/mcom.2018.1700058

Cited by 52 publications

(36 citation statements)

References 13 publications

(15 reference statements)

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“…The greatest source of impairments in systems using mode multiplexing in few mode fibers (FMF) comes from the cross-correlation (or crosstalk) induced when multiplexing and co-propagating spatial modes. Two broad strategies have emerged for dealing with this crosscorrelation: the use of extensive multiple input, multiple output (MIMO) processing to undo the correlations [1], and the use of components and fibers that avoid the introduction of correlations [2]. Each strategy has its advantages and disadvantages, and there is a lack of extensive modeling to quantify these differences.…”

Section: Introductionmentioning

confidence: 99%

Analysis of modal coupling due to birefringence and ellipticity in strongly guiding ring-core OAM fibers

Guerra¹,

Lonardi²,

Galtarossa³

et al. 2019

Opt. Express

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After briefly recalling the issue of OAM mode purity in strongly-guiding ring-core fibers, this paper provides a methodology to calculate the coupling strength between OAM mode groups due to fiber perturbations. The cases of stress birefringence and core ellipticity are theoretically and numerically investigated. It is found that both perturbations produce the same coupling pattern among mode groups, although with different intensities. The consequence is that birefringence causes the highest modal crosstalk because it strongly couples groups with a lower propagation-constant mismatch. The power coupling to parasitic TE and TM modes is also quantified for both perturbations and is found to be non-negligible. Approximate modal crosstalk formulas valid for weakly-guiding multi-core fibers, but whose parameters are adapted to the present case of strongly guiding OAM fibers, are found to provide a reasonable fit to numerical results. Finally, the effect that modal coupling has on OAM transmission is assessed in terms of SNR penalty.

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Section: Introductionmentioning

confidence: 99%

Analysis of modal coupling due to birefringence and ellipticity in strongly guiding ring-core OAM fibers

Guerra¹,

Lonardi²,

Galtarossa³

et al. 2019

Opt. Express

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“…There are no eigenmodes shared across OAM modes. OAM can The eliminate the burden of MIMO processing, and thus lower power consumption and system complexity [5].…”

Section: Introductionmentioning

confidence: 99%

WDM-Compatible Polarization-Diverse OAM Generator and Multiplexer in Silicon Photonics

Chen

Lin

Villers

et al. 2020

IEEE J. Select. Topics Quantum Electron.

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Spatial multiplexing using orbital angular momentum (OAM) modes is an efficient means of scaling up the capacity of fiber-optic communications systems; integrated multiplexers are crucial enablers of this approach. OAM modes are circularly polarized when propagating in a fiber, however, OAM generators previously demonstrated in silicon photonics use locally linearly polarized emitters. Coupling from multiplexers to fibers in those solutions results in extra loss and complexity. Moreover, many of those solutions are based on resonator structures with strong wavelength dependence, and are thus incompatible with wavelength-division multiplexing (WDM). We experimentally demonstrate on-chip generation and multiplexing of OAM modes using an array of circularly polarized 2D antennas with wide wavelength coverage. The proposed device was implemented on the standard 220-nm silicon-on-insulator platform. Optical vortex beams with OAM orders ranging from -3 to +3 in both left and right circular polarization states were generated from the same aperture across a wavelength range of 1540 nm to 1557 nm. This device could serve as a multiplexer or demultiplexer for up to 12 information bearing channels coupling into an OAM fiber, and is compatible with WDM multiplexing as well.

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“…When the OAM technology is adopted for optical communications, the transmission capacity has been obviously improved [3]- [6]. However, in the presence of atmospheric turbulence, the phase of optical waves carrying OAM could be changed, which decreases the capacity of OAM wireless communication systems seriously [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

The New Purity and Capacity Models for the OAM-mmWave Communication Systems Under Atmospheric Turbulence

Lou

2019

IEEE Access

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The orbital angular momentum (OAM) wireless communication technology is widely studied in recent literatures. But the atmospheric turbulence is rarely considered in analyzing the capacity of OAM-based millimeter wave (OAM-mmWave) communication systems. The OAM-mmWave propagated in the atmosphere environments is usually interfered by the atmospheric turbulence, resulting in the crosstalk among OAM channels, capacity degradation, etc. By taking into account the atmospheric turbulence effect, this paper proposes a new purity model and a new capacity model for the OAM-mmWave communication systems. Simulation results indicate that the OAM-mmWave propagation in the atmosphere environments is evidently interfered by atmospheric turbulence, where the capacity of the OAM-mmWave communication systems decreases with the increase of the transmission frequency.Index Terms-Atmospheric turbulence, orbital angular momentum, millimeter wave, capacity. In this paper the impact of atmospheric turbulence on the OAM-mmWave communication systems has been investigated. A new capacity model has been proposed for the OAM-mmWave communication systems considering the atmospheric turbulence effect. The contributions of this paper are summarized as follows: 1) A new purity model is proposed for OAM-mmWave communication systems considering the propagation characteristics of OAM-mmWave with the atmospheric turbulence. In general, the atmospheric turbulence arXiv:1909.04336v1 [eess.SP]

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Carrying Data on the Orbital Angular Momentum of Light

Cited by 52 publications

References 13 publications

Analysis of modal coupling due to birefringence and ellipticity in strongly guiding ring-core OAM fibers

Analysis of modal coupling due to birefringence and ellipticity in strongly guiding ring-core OAM fibers

WDM-Compatible Polarization-Diverse OAM Generator and Multiplexer in Silicon Photonics

The New Purity and Capacity Models for the OAM-mmWave Communication Systems Under Atmospheric Turbulence

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