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Browsing by Author "Mhlanga, T"

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Higher-order Bessel like beams with z-dependent cone angles

Author: Ismail, Y ; Barnes, G ; Mhlanga, T ; Belyi, V ; Forbes, A Date: Aug 2010 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 beams hold similar ... Read more
Laguerre Gaussian beam multiplexing through turbulence

Author: Trichili, A ; Mhlanga, T ; Naidoo, Darryl ; Dudely, A ; Zghal, M ; Forbes, A Date: 17 Aug 2014 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 after encountering ... Read more
Long range quasi-nondiffracting beams carrying orbital angular momentum

Author: Ismail, Y ; Barnes, G ; Mhlanga, T ; Belyi, V ; Forbes, A Date: Mar 2010 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 be included. 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
Superresolution beams

Author: Ngcobo, Sandile ; Forbes, A ; Ait-Ameur, K ; Mhlanga, T Date: Jul 2012 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 imaging microscopes ... Read more
Techniques to sort Bessel beams

Author: Dudley, Angela L ; Mhlanga, T ; McDonald, Andre M ; Roux, FS ; Lavery, M ; Padgett, M ; Forbes, A Date: Sep 2013 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 transforming lens to decompose ... Read more
Unravelling Bessel beams: Presentation

Author: Mhlanga, T ; Dudley, Angela L ; Lavery, M ; Padgett, M ; Forbes, A Date: Jul 2013 This study reports on the presentation of the 59th South African Institute of Physics Conference Unravelling Bessel beams. Read more

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Browsing by Author "Mhlanga, T"

Browsing by Author "Mhlanga, T"

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All of ResearchSpace

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