Author:Dudley, Angela L; Naidoo, Darryl; Forbes, ADate:Sep 2016We show how one can determine the various properties of light, from the modal content of laser beams to decoding the information stored in optical fields carrying orbital angular momentum, by performing a modal decomposition. Although the ...Read more
Author:Dudley, Angela L; Rosales-Guzman, C; Trichilli, A; Forbes, ADate:Jan 2017We implement digital holograms for the creation and detection of the spatial modes of light. We make use of modal decomposition theory to determine the numerous properties of light, from the modal content of laser beams to decoding the ...Read more
Author:Dudley, Angela L; Li, Y; Mhlanga, T; Escuti, M; Forbes, ADate:Sep 2013Nondiffracting 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 only a spatial light ...Read more
Author:Trichili, A; Mhlanga, T; Naidoo, Darryl; Dudely, A; Zghal, M; Forbes, ADate:17 Aug 2014We 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
Author:Schulze, C; Dudley, Angela L; Flamm, D; Duparre, M; Forbes, ADate:Jul 2013We 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 from a small set of ...Read more
Author:Schulze, C; Flamm, D; Dudley, Angela L; Forbes, A; Duparr'e, MDate:Feb 2013We 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 of the beams ...Read more
Author:Dudley, Angela L; Majola, N; Chetty, N; Forbes, ADate:25 Sep 2014In this work we construct coherent superpositions of Gaussian and vortex modes which can be described to occupy the complex-plane. We demonstrate how these fields can be experimentally constructed in a digital, controllable manner with a ...Read more
Author:Dudley, Angela L; Mhlanga, T; McDonald, Andre M; Roux, FS; Lavery, M; Padgett, M; Forbes, ADate:Sep 2013In 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
Author:Forbes, A; Schulze, C; Ngcobo, Sandile; Flamm, D; Naidoo, Darryl; Dudley, Angela L; Duparre, MDate:Feb 2013Modal 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 of liquid crystal ...Read more