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Browsing by Author "Roux, FS"

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  • Schulze, C; Roux, FS; Dudley, Angela L; Rop, R; Duparre, M; Forbes, A (American Physical Society, 2015)
    We introduce a class of light field that angularly accelerates during propagation. We show that the acceleration (deceleration) may be controlled by adjustment of a single parameter, and tuned continuously, down to no ...
  • Schulze, C; Roux, FS; Dudley, Angela L; Rop, R; Duparre, M; Forbes, A (2015-04)
    We introduce a class of light field that angularly accelerates during propagation. We show that the acceleration (deceleration) may be controlled by adjustment of a single parameter, and tuned continuously, down to no ...
  • Dudley, Angela L; Nock, M; Konrad, T; Roux, FS; Forbes, A (Optical Society of America, 2010-10)
    In this article, the authors present an amplitude damping channel for Laguerre-Gaussian modes. The channel is tested experimentally for a Laguerre-Gaussian mode, having an azimuthal index l = 1, illustrating that it decays ...
  • Roux, FS (Optical Society of America, 2011-04)
    Inhomogeneous optical vortex densities can be produced in stochastic optical fields by a combination of coherent and incoherent superposition of speckle fields. During subsequent propagation, the inhomogeneity in the vortex ...
  • Dudley, Angela L; Litvin, I; Roux, FS; Forbes, A (SAIP, 2012-07)
    This presentation analyses the azimuthal decomposition of optical modes. Decomposition of azimuthal modes need two steps, namely generation and decomposition. An azimuthally-varying phase (bounded by a ring-slit) placed ...
  • Litvin, IA; Dudley, Angela L; Roux, FS; Forbes, A (Optical Society of America, 2012-05)
    We demonstrate a simple approach, using digital holograms, to perform a complete azimuthal decomposition of an optical field. Importantly, we use a set of basis functions that are not scale dependent so that unlike other ...
  • Zhang, Y; Roux, FS; McLaren, M; Forbes, A (SPIE, 2014-08)
    Considering the quantum state produced in type I spontaneous parametric down-conversion with collinear, degenerate signal and idler beams, and a Gaussian pump, we show that the azimuthal Schmidt number in the Laguerre-Gaussian ...
  • Mclaren, M; Roux, FS; Forbes, A (2013-07)
    This is a power point presentation on testing Bessel-Gaussian entanglement.
  • Dudley, Angela L; Litvin, I; Roux, FS; Forbes, A (SPIE Digital library, 2013-02)
    By using digital holograms, we present a simple technique for performing a complete azimuthal decomposition of an arbitrary laser mode. The match-filter, used to perform the azimuthal decomposition, is bounded by an annular ...
  • Dudley, Angela L; Schulze, C; Roux, FS; Duparré, M; Forbes, A (2013-06)
    In this work we present a mechanism for generating superpositions of non-canonical, higherorder Bessel beams, which are characterized by the anisotropy of the optical vortex on the propagation axis, known as the morphology ...
  • Roux, FS (IOP Publishing, 2013-11)
    The study of optical vortices in stochastic optical fields involves various quantities, including the vortex density and topological charge density, that are defined in terms of local expectation values of the distributions ...
  • Roux, FS (2013-07)
    This presentation focuses on the decay of orbital angular momentum entanglement in atmospheric turbulence.
  • Roux, FS (CSIR, 2012-06)
    This report present the presentation on deconstructing quantum decoherence in atmospheric turbulence. The focus was on the classical and quantum scintillation, time vs propagation distance, current paradigm: Paterson model, ...
  • 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, ...
  • Zhang, YI; Roux, FS; Konrad, T; Agnew, M; Leach, J; Forbes, A (American Association for the Advancement of Science, 2016-02)
    Many protocols in quantum science, for example, linear optical quantum computing, require access to large-scale entangled quantum states. Such systems can be realized through many-particle qubits, but this approach often ...
  • 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 ...
  • Roux, FS (SPIE, 2011-01)
    Stochastic vortex fields are found in laser speckle, in scintillated beams propagating through a turbulent atmosphere, in images of holograms produced by Iterative Fourier Transform methods and in the beams produced by ...