Browsing Journal Articles by Subject "OAM"

Now showing items 1-12 of 12

Entangled Bessel-Gaussian beams

Author: McLaren, M ; Agnew, M ; Leach, J ; Roux, FS ; Padgett, MJ ; Boyd, RW ; Forbes, A Date: Oct 2012 Orbital angular momentum (OAM) entanglement is investigated in the Bessel-Gaussian (BG) basis. Having a readily adjustable radial scale, BG modes provide an alternative basis for OAM entanglement over Laguerre-Gaussian modes. We show that the ... Read more
Measurement of the orbital angular momentum density of Bessel beams by projection into a Laguerre–Gaussian basis

Author: Schulze, C ; Dudley, Angela L ; Brüning, R ; Duparré, M ; Forbes, A Date: Sep 2014 We present the measurement of the orbital angular momentum (OAM) density of Bessel beams and superpositions thereof by projection into a Laguerre–Gaussian basis. This projection is performed by an all-optical inner product measurement performed ... Read more
Optical communication beyond orbital angular momentum

Author: Trichili, A ; Rosales-Guzmán, C ; Dudley, Angela L ; Ndagano, B ; Salem, AB ; Zghal, M ; Forbes, A Date: Jun 2016 Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase the data transmission ... Read more
Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam

Author: Romero, J ; Giovannini, D ; McLaren, MG ; Galvez, EJ ; Forbes, A ; Padgett, MJ Date: Aug 2012 We report orbital angular momentum (OAM) and angle correlations between signal and idler photons observed when the nonlinear crystal used in spontaneous parametric down-conversion is illuminated by a non-fundamental Gaussian pump beam. We ... Read more
Parameter dependence in the atmospheric decoherence of modal entangled photon pairs

Author: Ibrahim, AH ; Roux, FS ; Konrad, T Date: Nov 2014 When a pair of photons that are entangled in terms of their transverse modes, such as an orbital angular momentum (OAM) basis, propagates through atmospheric turbulence, the scintillation causes a decay of the entanglement. Here, we use ... Read more
Propagation of orbital angular momentum carrying beams through a perturbing medium

Author: Chaibi, A ; Mafusire, C ; Forbes, A Date: Sep 2013 The orbital angular momentum of light has been suggested as a means of information transfer over free-space, yet the detected optical vortex is known to be sensitive to perturbation. Such effects have been studied theoretically, in particular ... Read more
Quantitative measurement of the orbital angular momentum density of light

Author: Dudley, Angela L ; Litvin, IA ; Forbes, A Date: Mar 2012 In this work we derive expressions for the orbital angular momentum (OAM) density of light, for both symmetric and nonsymmetric optical fields, that allow a direct comparison between theory and experiment. We present a simple method for ... Read more
Qudit-Teleportation for photons with linear optics

Author: Goyal, SK ; Boukama-Dzoussi, PE ; Ghosh, S ; Roux, FS ; Konrad, T Date: Apr 2014 Quantum teleportation, the transfer of the state of one quantum system to another without direct interaction between both systems, is an important way to transmit information encoded in quantum states and to generate quantum correlations ... Read more
Radial modal dependence of the azimuthal spectrum after parametric down-conversion

Author: Zhang, Y ; Roux, FX ; McLaren, M ; Forbes, A Date: 2014 The radial degrees of freedom of the biphoton states that are produced in spontaneous parametric down-conversion (SPDC) in the Laguerre-Gaussian (LG) basis are investigated, theoretically and experimentally. We calculated the theoretical ... Read more
Self-healing of quantum entanglement after an obstruction

Author: McLaren, M ; Mhlanga, T ; Padgett, MJ ; Roux, FS ; Forbes, A Date: Feb 2014 Quantum entanglement between photon pairs is fragile and can easily be masked by losses in transmission path and noise in the detection system. When observing the quantum entanglement between the spatial states of photon pairs produced by ... Read more
Two-photon optics of Bessel-Gaussian modes

Author: McLaren, M ; Romero, J ; Padgett, MJ ; Roux, FS ; Forbes, A Date: Sep 2013 In this paper we consider geometrical two-photon optics of Bessel-Gaussian modes generated in spontaneous parametric down-conversion of a Gaussian pump beam. We provide a general theoretical expression for the orbital angular momentum (OAM) ... Read more
Vector-mode decay in atmospheric turbulence: An analysis inspired by quantum mechanics

Author: Nape, I ; Mashaba, Nikiwe P ; Mphuthi, N ; Jayakumar, S ; Bhattacharya, S ; Forbes, Andrew Date: Mar 2021 Vector beams are inhomogeneously polarized optical fields with nonseparable, quantum-like correlations between their polarization and spatial components, and hold tremendous promise for classical and quantum communication across various ... Read more

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Browsing Journal Articles by Subject "OAM"

Browsing Journal Articles by Subject "OAM"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect