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Browsing by Author "Schulze, C"

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  • 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 ...
  • 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 ...
  • Schulze, C; Flamm, D; Dudley, Angela L; Forbes, A; Duparr'e, M (SPIE Digital library, 2013-02)
    We present a novel technique to measure the orbital angular momentum (OAM) density of light. The technique is based on modal decomposition, enabling the complete reconstruction of optical fields, including the reconstruction ...
  • Schulze, C; Ngcobo, S; Duparre, M; Forbes, A (Optical Society of America, 2012-12)
    The modal decomposition of an arbitrary optical field may be done without regard to the spatial scale of the chosen basis functions, but this generally leads to a large number of modes in the expansion. While this may be ...
  • Flamm, D; Naidoo, Darryl; Schulze, C; Forbes, A; Duparré, M (Optical Society of America, 2012-07)
    A procedure for the real-time analysis of laser modes using a phase-only spatial light modulator is outlined. The procedure involves encoding into digital holograms by complex amplitude modulation a set of orthonormal basis ...
  • Dudley, Angela L; Schulze, C; Litvin, I; Duparré, M; Forbes, A (SPIE Proceedings, 2013-08)
    Although many techniques are efficient at measuring optical orbital angular momentum (OAM), they do not allow one to obtain a quantitative measurement for the OAM density across an optical field and instead only measure ...
  • Schulze, C; Dudley, Angela L; Flamm, D; Duparré, M; Forbes, A (Optical Society of America, 2013-07)
    We present the reconstruction of a laser beam wavefront from its mode spectrum and investigate in detail the impact of distinct aberrations on the mode composition. The measurement principle is presented on a Gaussian beam ...
  • Schulze, C; Dudley, Angela L; Flamm, D; Duparr, M; Forbes, A (The Optical Society of America, 2013-10)
    We present a novel tool for sorting the orbital angular momentum and to determine the orbital angular momentum density of laser beams, which is based on the use of correlation filters.
  • Forbes, A; Schulze, C; Ngcobo, S; Flamm, D; Naidoo, Darryl; Dudley, Angela L; Duparre, M (SPIE Proceedings, 2013-02)
    Modal decomposition of optical fields as a concept has been in existence for many decades, yet despite its clear applications to laser beam analysis it has nevertheless remained a seldom used tool. With the commercialization ...
  • Schulze, C; Naidoo, Darryl; Flamm, D; Schmidt, OA; Forbes, A; Duparr, M (Optical Society of America, 2012-08)
    We propose a new method to determine the wavefront of a laser beam based on modal decomposition by computer-generated holograms. The hologram is encoded with a transmission function suitable for measuring the amplitudes ...