Author:Olivier, Marius; Mostert, FJ; Snyman, IMDate:2013The light output from Argon-bombs was investigated by means of ultra high speed photography (Cordin Model 550-32 camera) and locally developed photodiode sensors. Tubes of various sizes were inflated with Argon gas, and were detonated on one ...Read more
Author:Mafusire, C; Forbes, A; Snedden, Glen CDate:Aug 2010When a metal horizontal pipe is heated and spun along its axis, a graded refractive index distribution is generated which is can be used as a lens, thus its name, the spinning pipe gas lens (SPGL). Previous experimental results of its performance ...Read more
Author:Willers, Cornelius J; Roodt, JHDate:Apr 2011This paper describes the application of simulation in the development of aircraft self-protection countermeasures against infrared missiles. The integrated approach followed here consists of repeated cycles of materiel1 characterisation, ...Read more
Author:Dudley, Angela L; Forbes, ADate:May 2014This study reports on the presentation of the second international conference on applications of optics and photonics: Digitally controlling the ‘twist’ of light.Read more
Author:Willers, Cornelius J; Al-Ghamdi, AA; Bezuidenhout, DF; Al-Hosiny, NMDate:Apr 2011The protection of own aircraft assets against infrared missile threats requires a deep understanding of the vulnerability of these assets with regard to specific threats and specific environments of operation. A key capability in the protection ...Read more
Author:Roux, FSDate:Jan 2011Stochastic vortex fields are found in laser speckle, in scintillated beams propagating through a turbulent atmosphere, in images of holograms produced by Iterative Fourier Transform methods and in the beams produced by certain diffractive ...Read more
Author:Naidoo, Kavendra; Skews, BWDate:Sep 2010Dynamic shock wave reflection generated by a rapidly pitching wedge in a steady supersonic free stream has been studied with numerical simulation previously. An experimental facility was developed for the investigation of these dynamic phenomena ...Read more
Author:Naidoo, Darryl; Aït-Ameur, K; Forbes, ADate:Aug 2011In this paper the authors explore vortex beams and in particular the generation of single LG0l modes and superpositions thereof. Vortex beams carry orbital angular momentum (OAM) and this intrinsic property makes them prevalent in transferring ...Read more
Author:Esser, DDate:Oct 2012In this presentation the development path of new solid-state laser technology, which is taken from the underlying laser physics to challenging real world applications, is shown.Read more
Author:Ray, Suprakas SDate:Oct 2012In this presentation the author outlines how nanotechnology is deeply linked with photonics for a bright future.Read more
Author:Mafusire, C; Forbes, A; Michaelis, MM; Snedden, Glen CDate:Aug 2010Gas lenses work on the basis that aerodynamic media can be used to generate a graded refractive index distribution which can be used to focus a laser beam. Examples of these are the spinning pipe gas lens (SPGL) and the flame lens (FL). The ...Read more
Author:Willers, Cornelius JDate:Sep 2009From its humble beginnings in an optical workshop in the Mowbray office for Triangulation in the 1930s and the subsequent formation of the Division for Optics and Spectroscopy at the National Physical Research Laboratory within the CSIR during ...Read more
Author:Bollig, C; Forbes, A; Dlamini, TDate:Dec 2007This document gives an overview of the development of photonics in South Africa. The development of science, engineering and technology (SET) has been identified as one of the key elements for the long-term sustainability and competitiveness ...Read more
Author:Godin, T; Ngcobo, Sandile; Cagniot, E; Fromager, M; Forbes, A; Aït-Ameur, KDate:Aug 2011Many applications of lasers seek nowadays for focal spots whose corresponding volume is getting smaller and smaller in order to ensure high spatial resolution. This problem, studied by many research groups around the world, is the core of ...Read more
Author:Roux, FSDate:Feb 2014This presentation discusses the vitality of optical vortices to distinguish between vortex dipole creation and annihilation events. Vitality is expressed in terms of the transverse 1st and 2nd order derivatives of the optical field. It can ...Read more