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Browsing by Author "Dudley, Angela L"

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Accelerated rotation with orbital angular momentum modes

Author: Schulze, C ; Roux, FS ; Dudley, Angela L ; Rop, R ; Duparre, M ; Forbes, A Date: 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 acceleration at all. As ... Read more
Accelerated rotation with orbital angular momentum modes

Author: Schulze, C ; Roux, FS ; Dudley, Angela L ; Rop, R ; Duparre, M ; Forbes, A Date: Apr 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 acceleration at all. As ... Read more
Affects of binary and continuous phase modulations on the structure of Bessel beams

Author: Dudley, Angela L ; Vasilyeu, R ; Belyi, V ; Khilo, N ; Ropot, P ; Forbes, A Date: Sep 2010 The authors implement a novel technique to operate a phase-only spatial light modulator (SLM) in amplitude mode, allowing them to reproduce Durnin’s ring slit on a liquid crystal display (LCD). The affects of binary and continuous phase ... Read more
All-digital wavefront sensing for structured light beams

Author: Dudley, Angela L ; Milione, G ; Alfano, RR ; Forbes, A Date: 2014 We 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
Amplitude damping channel for orbital angular momentum

Author: Dudley, Angela L ; Nock, M ; Konrad, T ; Forbes, A Date: Mar 2010 Since the pioneering work on the entanglement of the orbital angular momentum (OAM) states of light, much attention has been devoted to the subject, with particular attention into the quantum aspects of information processing using OAM. ... Read more
Amplitude damping of Laguerre-Gaussian modes - Journal Article

Author: Dudley, Angela L ; Nock, M ; Konrad, T ; Roux, FS ; Forbes, A Date: Oct 2010 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 to a Gaussian mode ... Read more
Amplitude damping of vortex modes

Author: Dudley, Angela L ; Nock, M ; Konrad, T ; Roux, F ; Forbes, A Date: Sep 2010 An interferometer, mimicking an amplitude damping channel for vortex modes, is presented. Experimentally the action of the channel is in good agreement with that predicted theoretically. Since we can characterize the action of the channel on ... Read more
Angular Accelerating White Light

Author: Dudley, Angela L ; Vette, C ; Szameit, A ; Forbes, A Date: Aug 2015 Significant interest has been devoted to tailoring optical fields that transversely accelerate during propagation in the form of Airy, Weber and Mathieu beams. In this work, the authors introduce a new type of optical field that exhibits ... Read more
Azimuthal decomposition of optical modes

Author: Dudley, Angela L ; Litvin, I ; Roux, FS ; Forbes, A Date: Jul 2012 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 in the spatial frequency ... Read more
Azimuthal decomposition with digital holograms

Author: Litvin, IA ; Dudley, Angela L ; Roux, FS ; Forbes, A Date: May 2012 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 methods, no knowledge ... Read more
Characterising laser beams with liquid crystal displays

Author: Dudley, Angela L ; Naidoo, Darryl ; Forbes, A Date: Sep 2016 We 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
Characterization of high-dimensional entangled systems via mutually unbiased measurements

Author: Giovannini, D ; Romero, J ; Leach, J ; Dudley, Angela L ; Forbes, A ; Padgett, MJ Date: Apr 2013 Mutually unbiased bases (MUBs) play a key role in many protocols in quantum science, such as quantum key distribution. However, defining MUBs for arbitrary high-dimensional systems is theoretically difficult, and measurements in such bases ... Read more
Complete azimuthal decomposition of optical fields

Author: Dudley, Angela L ; Litvin, I ; Roux, FS ; Forbes, A Date: Feb 2013 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 ring, allowing us ... Read more
Controlled acceleration of superimposed Bessel beams

Author: Dudley, Angela L ; Schulze, C ; Roux, FS ; Duparré, M ; Forbes, A Date: Jun 2013 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 parameter. We ... Read more
Controlled generation of higher-order Poincaré sphere beams from a laser

Author: Naidoo, Darryl ; Roux, Filippus S ; Dudley, Angela L ; Litvin, Igor ; Piccirillo, B ; Marrucci, L ; Forbes, A Date: Mar 2016 The angular momentum of light can be described by positions on a higher-order Poincaré sphere, where superpositions of spin and orbital angular momentum states give rise to laser beams that have many applications, from microscopy to materials ... Read more
Controlling the evolution of nondiffracting speckle by complex amplitude modulation on a phase-only spatial light modulator

Author: Dudley, Angela L ; Vasilyeu, R ; Belyi, V ; Khilo, N ; Ropot, P ; Forbes, A Date: Sep 2011 In this work we investigate the structure of nondiffracting speckle fields, both experimentally and theoretically. We are able to produce very good agreement between the experimentally recorded and theoretically calculated fields by using ... Read more
Creating and decomposing vector Bessel beams

Author: Dudley, Angela L ; Li, Y ; Mhlanga, T ; Escuti, M ; Forbes, A Date: Jul 2013 This is a paper presented on creating and decomposing vector Bessel beams, presented at the 58th annual SAIP conference. Read more
Creation and detection of optical modes with spatial light modulators

Author: Forbes, A ; Dudley, Angela L ; McLaren, M Date: Jun 2016 Modal 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
Digital holograms for laser mode multiplexing

Author: Mhlanga, T ; Trichili, A ; Dudley, Angela L ; Naidoo, Darryl ; Zghal, M ; Forbes, A Date: 02 Oct 2014 High-capacity data transmission has been implemented using single channel optical systems. This technique is limited and soon it will be unable to ful ll the growing needs for higher bit rate data transmission. Hence multi-mode transmission ... Read more
Digitally controlling the ‘twist’ of light

Author: Dudley, Angela L ; Forbes, A Date: May 2014 This study reports on the presentation of the second international conference on applications of optics and photonics: Digitally controlling the ‘twist’ of light. Read more

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