GENERAL ENQUIRIES: Tel: + 27 12 841 2911 | Email: callcentre@csir.co.za

Browsing by Subject "OAM"

Sort by: Order: Results:

  • Dudley, Angela L; Mafu, M; Goyal, S; Giovannini, D; McLaren, M; Konrad, T; Padgett, MJ; Petruccione, F; Lutkenhaus, N; Forbes, A (2013-07)
    We encode mutually unbiased bases (MUBs) using the higher-dimensional orbital angular momentum (OAM) degree of freedom associated with optical fields. We illustrate how these states are encoded with the use of a spatial ...
  • McLaren, M; Agnew, M; Leach, J; Roux, FS; Padgett, MJ; Boyd, RW; Forbes, A (Optical Society of America, 2012-10)
    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 ...
  • Roux, FS; Wellens, T; Shatokhin, V (CSIR, 2015-06)
    Recently, an infinitesimal propagation equation was derived for the evolution of orbital angular momentum entangled photonic quantum states through turbulence. The authors will discuss its derivation and application within ...
  • Roux, FS; Wellens, T; Shatokhin, V (SPIE, 2015-08)
    The evolution of the quantum states of photons propagating through turbulence can be investigated with the infinitesimal propagation equation (IPE). However, when it is expressed directly in terms of an orbital angular ...
  • Gailele, Lucas M; Dudley, Angela; Ndagano, B; McLaren M, M; Rosales, C; Forbes, A (2016-07)
    The orbital angular momentum (OAM) of light has become the focus of intensive research. Traditional optical communication systems optimize multiplexing in the polarization and the wavelength of light to attain an increase ...
  • Hamadou Ibrahim, A; Roux, FS; McLaren, M; Forbes, A; Konrad, T (2013-06)
    This is a power point presentation questioning the feasablility of free space quantum communication with the OAM state of light. Presented June 2013
  • Schulze, C; Dudley, Angela L; Brüning, R; Duparré, M; Forbes, A (Optical Society of America, 2014-09)
    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 ...
  • Dudley, Angela L; Litvin, I; Forbes, A (SPIE, 2012-01)
    To measure the Orbital Angular Momentum (OAM) density of superposition fields two steps are needed: generation and measurement. An azimuthally-varying phase (bounded by a ring-slit) placed in the spatial frequency domain ...
  • Trichili, A; Rosales-Guzmán, C; Dudley, Angela; Ndagano, B; Salem, AB; Zghal, M; Forbes, A (Macmillan Publishers Limited, part of Springer Nature, 2016-06)
    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 ...
  • Romero, J; Giovannini, D; McLaren, MG; Galvez, EJ; Forbes, A; Padgett, MJ (European Optical Society, 2012-08)
    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 ...
  • Ibrahim, AH; Roux, FS; Konrad, T (American Physical Society, 2014-11)
    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. ...
  • Chaibi, A; Mafusire, C; Forbes, A (IOP Publishing, 2013-09)
    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 ...
  • Dudley, Angela L; Litvin, IA; Forbes, A (Optical Society of America, 2012-03)
    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 ...
  • Dudley, Angela L; Schulze, C; Litvin, I; Duparré, M; Forbes, A (SPIE Proceedings, 2013-08)
    Although many techniques are efficient at measuring optical orbital angular momentum (OAM), they do not allow one to obtain a quantitative measurement for the OAM density across an optical field and instead only measure ...
  • Goyal, SK; Boukama-Dzoussi, PE; Ghosh, S; Roux, FS; Konrad, T (Nature Publishing Group, 2014-04)
    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 ...
  • Zhang, Y; Roux, FX; McLaren, M; Forbes, A (American Physical Society, 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 ...
  • McLaren, M; Mhlanga, T; Padgett, MJ; Roux, FS; Forbes, A (Nature Publishing Group, 2014-02)
    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 ...
  • Dudley, Angela L (2012-01)
    The work presented in this thesis is centred on the generation of superimposed optical fields which each carry orbital angular momentum (OAM) and the development of OAM measurement techniques. Optical fields which carry ...
  • McLaren, M; Romero, J; Padgett, MJ; Roux, FS; Forbes, A (American Physical Society, 2013-09)
    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 ...
  • Roux, FS (CSIR, 2015-02)
    This report present the presentation on what's all this about entanglement?