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Browsing by Author "Dudley, A"

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  • Spangenberg, D-M; Dudley, Angela L; Neethling, P; Forbes, A; Rohwer, E (SPIE Proceedings, 2013-08)
    SLMs used for spatial modulation of lasers are often used in conjunction with very narrow bandwidth laser light where diffractive dispersion could be approximated as a constant. It is known that diffractive dispersion is ...
  • 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, ...
  • Trichili, A; Dudley, Angela L; Salem, AB; Ndagano, B; Zghal, M; Forbes, A (SPIE, 2015-08)
    The authors experimentally demonstrate an information encoding protocol using the two degrees of freedom of Laguerre Gaussian modes having different radial and azimuthal components. A novel method, based on digital holography, ...
  • 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 ...
  • Dudley, Angela L; Vasilyeu, R; Forbes, A; Khilo, N; Ropot, P (2009-07)
    This presentation provides information on experimental generation and application of the superposition of higher-order Bessel beams. The superposition of zero order Bessel beams can be used to measure the radius of curvature ...
  • Dudley, Angela L; Forbes, A (Optical Society of America, 2012-04)
    In this work we use a phase-only spatial light modulator (SLM) to mimic a ring-slit aperture, containing multiple azimuthally varying phases at different radial positions. The optical Fourier transform of such an aperture ...
  • 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 ...
  • Vasilyeu, R; Dudley, Angela L; Khilo, N; Forbes, A (Optical Society of America, 2009-10)
    An experimental setup to generate a superposition of higher-order Bessel beams by means of a spatial light modulator and ring aperture is presented. The experimentally produced fields are in good agreement with those ...
  • Vasilyeu, R; Dudley, Angela L; Khilo, N; Forbes, A (Optical Society of America, 2009-12)
    The authors report the first experimental generation of the superposition of higher-order Bessel beams, by means of a spatial light modulator (SLM) and a ring slit aperture. They present illuminating a ring slit aperture ...
  • Mafu, M; Dudley, Angela L; Goyal, S; Giovannini, D; McLaren, M; Padgett, MJ; Konrad, T; Petruccione, F; Lutkenhaus, N; Forbes, A (American Physical Society, 2013-09)
    We present an experimental study of higher-dimensional quantum key distribution protocols based on mutually unbiased bases, implemented by means of photons carrying orbital angular momentum. We perform (d + 1) mutually ...
  • Forbes, A; Schulze, C; Flamm, D; Dudley, Angela L; Duparre, M (Optical Society of America, 2013-04)
    We show how laser beam characterization may be done in real-time with digital holograms. We illustrate the power of the techniques by applying them to a variety of laser sources, from fibers to solid-state.
  • 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 ...
  • Schulze, C; Dudley, Angela L; Flamm, D; Duparre, M; Forbes, A (IOP Publishing, 2013-07)
    We demonstrate a versatile method for the measurement of the orbital angular momentum (OAM) density of an optical field. By performing a modal decomposition with digital holograms, we reconstruct the full optical field ...
  • Dudley, Angela L; Milione, G; Alfano, R; Forbes, A (CSIR, 2014-07)
    The presentation focuses on how horizontal and vertical components of a field can be extracted via Stokes polarimetry
  • 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 ...
  • Milione, G; Dudley, Angela L; Nguyen, TA; Chakraborty, O; Karimi, E; Forbes, A; Alfano, RR (IOP Publishing, 2015-02)
    We experimentally measured the self-healing of the spatially inhomogeneous states of polarization of vector Bessel beams. Radially and azimuthally polarized vector Bessel beams were experimentally generated via a digital ...
  • Milione, G; Dudley, Angela L; Nguyen, TA; Chakraborty, O; Karimi, E; Forbes, A; Alfano, R (IOP Publishing, 2015-02)
    We experimentally measured the self-healing of the spatially inhomogeneous states of polarization of vector Bessel beams. Radially and azimuthally polarized vector Bessel beams were experimentally generated via a digital ...