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Browsing by Author "Belyi, V"

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  • Dudley, Angela L; Vasilyeu, R; Belyi, V; Khilo, N; Ropot, P; Forbes, A (South African Institute of Physics, 2010-09)
    The authors implement a novel technique to operate a phase-only spatial light modulator (SLM) in amplitude mode, allowing them to reproduce Durnin’s ring slit on a liquid crystal display (LCD). The affects of binary and ...
  • Dudley, Angela L; Vasilyeu, R; Belyi, V; Khilo, N; Ropot, P; Forbes, A (Elsevier, 2011-09)
    In this work we investigate the structure of nondiffracting speckle fields, both experimentally and theoretically. We are able to produce very good agreement between the experimentally recorded and theoretically calculated ...
  • 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 ...
  • Litvin, IA; Loveday, PW; Long, CS; Kazak, NS; Belyi, V; Forbes, A (Society of Photo-Optical Instrumentation Engineers (SPIE), 2008-08)
    There are many applications in which a laser beam with a flat–top intensity profile would be ideal, as compared to a laser beam with a non–uniform energy distribution. Standard stable optical resonators will unfortunately ...
  • 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 ...
  • Ismail, Y; Khilo, N; Belyi, V; Forbes, A (European Optical Society, 2012-09)
    We present a method for generating higher-order Bessel beams with z-dependent cone angles. Such fields, if engineered correctly, are shape invariant during propagation and thus do not suffer from a transition from a ...
  • Dudley, Angela L; Vasilyeu, R; Forbes, A; Khilo, N; Ropot, P; Belyi, V; Kazak, N (Society of Photo-Optical Instrumentation Engineers (SPIE), 2009-08)
    This paper presents a mechanism for the generation of the superposition of higher-order Bessel beams, which implements a ring slit aperture and spatial light modulator (SLM). The experimental technique is also adapted to ...