Author:Dudley, Angela L; Milione, G; Alfano, RR; Forbes, ADate:2014We present a new all-digital technique to extract the wavefront of a structured light beam. Our method employs non-homogeneous polarization optics together with dynamic, digital holograms written to a spatial light modulator to measure the ...Read more
Author:Forbes, A; Dudley, Angela L; McLaren, MDate:Jun 2016Modal decomposition of light has been known for a long time, applied mostly to pattern recognition. With the commercialization of liquid-crystal devices, digital holography as an enabling tool has become accessible to all, and with it all-digital ...Read more
Author:Rosales-Guzmán, C; Trichili, A; Dudley, Angela L; Ndagano, B; Salem, ABDate:Oct 2016By combining both the azimuthal and radial components of Laguerre-Gaussian modes with wavelength division multiplexing, we generated >100 information channels. We implemented a laboratory free-space link using 35 Laguerre-Gaussian modes and ...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:Forbes, A; Schulze, C; Flamm, D; Dudley, Angela L; Duparre, MDate:Apr 2013We 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.Read more
Author:Schulze, C; Ngcobo, Sandile; Duparre, M; Forbes, ADate:Dec 2012The 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 considered as ...Read more
Author:Vetter, C; Dudley, Angela L; Szameit, A; Forbes, ADate:Aug 2017Accelerating waves have received significant attention of late, first in the optical domain and later in the form of electron matter waves, and have found numerous applications in non-linear optics, material processing, microscopy, particle ...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
Author:Schulze, C; Naidoo, Darryl; Flamm, D; Schmidt, OA; Forbes, A; Duparr, MDate:Aug 2012We 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 and phases of the modes ...Read more
Author:Spangenberg, D-M; Dudley, Angela L; Neethling, PH; Rohwer, EG; Forbes, ADate:2014Spatial light modulators are ubiquitous tools for wavefront control and laser beam shaping but have traditionally been used with monochromatic sources due to the inherent wavelength dependence of the calibration process and subsequent phase ...Read more