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Browsing by Author "Mhlanga, T"

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  • Dudley, Angela L; Li, Y; Mhlanga, T; Escuti, M; Forbes, A (2013-07)
    This is a paper presented on creating and decomposing vector Bessel beams, presented at the 58th annual SAIP conference.
  • Mhlanga, T; Trichili, A; Dudley, Angela L; Naidoo, Darryl; Zghal, M; Forbes, A (SPIE, 2014-10-02)
    High-capacity data transmission has been implemented using single channel optical systems. This technique is limited and soon it will be unable to ful ll the growing needs for higher bit rate data transmission. Hence multi-mode ...
  • Dudley, Angela L; Mhlanga, T; Lavery, M; McDonald, A; Roux, FS; Padget, M; Forbes, A (Optical Society of America, 2013-01)
    We demonstrate the efficient sorter of Bessel beams separating both the azimuthal and radial components. This is based upon the recently reported transformation of angular to transverse momentum states. We separately ...
  • Mhlanga, T; Dudley, Angela L; McDonald, A; Roux, FS; Lavery, M; Padgett, M; Forbes, A (SPIE Digital llibrary, 2013-02)
    A procedure to efficiently sort orbital angular momentum (OAM) states of light, by performing a Cartesian to log-polar coordinate transformation which translates helically phased beams into a transverse phase gradient, ...
  • Li, Y; Dudley, Angela L; Mhlanga, T; Escutia, MJ; Forbes, A (SPIE Proceedings, 2013-08)
    We experimentally generate non-diffracting vector vortex beams by using a Spatial Light Modulator (SLM) and an azimuthal birefringent plate (q-plate). The SLM generates scalar Bessel beams and the q-plate converts them to ...
  • Dudley, Angela L; Lib, Y; Mhlanga, T; Escuti, M; Forbes, A (SPIE Proceedings, 2014-03)
    We demonstrate how to create non-diffracting vector Bessel beams by implementing a spatial light modulator (SLM) to generate scalar Bessel beams which are then converted into vector fields by the use of an azimuthally-varying ...
  • Dudley, Angela L; Li, Y; Mhlanga, T; Escuti, M; Forbes, A (Optical Society of America, 2013-09)
    Nondiffracting vector Bessel beams are of considerable interest due to their nondiffracting nature and unique high-numerical-aperture focusing properties. Here we demonstrate their creation by a simple procedure requiring ...
  • Ismail, Y; Barnes, G; Mhlanga, T; Belyi, V; Forbes, A (SPIE, 2010-08)
    As in the case of zero-order Bessel beam being produced by illuminating an axicon with a Gaussian beam, higher-order Bessel beams are generated by substituting the Gaussian beam with a Laguerre Gaussian (LG) beam. These ...
  • Trichili, A; Mhlanga, T; Naidoo, Darryl; Dudely, A; Zghal, M; Forbes, A (SPIE, 2014-08-17)
    We analyze the effect of atmospheric turbulence on the propagation of multiplexed Laguerre Gaussian modes. We present a method to multiplex Laguerre Gaussian modes using digital holograms and decompose the resulting field ...
  • Ismail, Y; Barnes, G; Mhlanga, T; Belyi, V; Forbes, A (2010-03)
    In this paper the authors outline an optical design for producing high-order Bessel-like beams with a z-dependent cone angle through the use of conventional optical elements, without the need for deliberate aberrations to ...
  • 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 ...
  • Ngcobo, S; Forbes, A; Ait-Ameur, K; Mhlanga, T (2012-07)
    The transformation of a Gaussian beam into a symmetrical TEMp0 Laguerre Gaussian beam (LGB) intensity distribution which has transverse superresolution properties is very useful in improving the spatial resolution of optical ...
  • Dudley, Angela L; Mhlanga, T; McDonald, A; Roux, FS; Lavery, M; Padgett, M; Forbes, A (SPIE Proceedings, 2013-09)
    In this work we will present two techniques for the measurement of superimposed higher-order Bessel beams. In the first technique we will outline a simple approach using only a spatial light modulator and a Fourier ...
  • Mhlanga, T; Dudley, Angela L; Lavery, M; Padgett, M; Forbes, A (2013-07)
    This study reports on the presentation of the 59th South African Institute of Physics Conference Unravelling Bessel beams.