Browsing Conference Publications by Subject "Laser beams"

Now showing items 1-13 of 13

An all-optical system designed for the heating and temperature measurement of the diamond tool

Author: Masina, Bathusile N ; Forbes, A ; Bodkin, R ; Mwakikunga, Bonex W Date: Jul 2012 Diamond tools are used in industry for abrasive applications such as grinding, and drilling. One of its important applications is in drill bits used for drilling through rock in search of oil. The early failure of drill bits used in oil ... Read more
Analysing real-world turbulence at low cost

Author: Mashaba, Nikiwe P ; Griffith, DJ Date: Nov 2020 Absorption, scattering and refractive index fluctuations are three primary phenomena contributing to optical turbulence. Temperature fluctuations, humidity and air velocity cause variations on both temporal and spatial, in the refractive ... Read more
The generation of flat-top beams by complex amplitude modulation with a phase-only spatial light modulator

Author: Hendriks, A ; Naidoo, Darryl ; Roux, FS ; Löpez-Mariscal, C ; Forbes, A Date: Aug 2012 Phase-only spatial light modulators are now ubiquitous tools in modern optics laboratories, and are often used to generate so-called structured light. In this work we outline the use of a phase-only spatial light modulator to achieve full ... Read more
Intra-cavity decomposition of a dual-directional laser beam

Author: Naidoo, Darryl ; Forbes, A ; Aït-Ameur, K ; Fromager, M Date: Jan 2011 A method of decomposing a dual-directional laser beam into a forward propagating field and a backward propagating field for an apertured plano-concave cavity is presented. An intra-cavity aperture is a simple method of laser beam shaping as ... Read more
Laser alloyed Al-Ni-Fe coatings

Author: Pityana, Sisa L ; Rossouw, R Date: Oct 2008 The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe ... Read more
Laser cladding of aluminium using TiB2

Author: Kumar, S ; Pityana, Sisa L Date: Mar 2010 Modification of Aluminium surface by injecting, dispersing and melting TiB2 powder with the help of a laser beam promises to enhance tribological properties of Aluminium. The present work consists of making single lines and various overlapping ... Read more
Long range quasi-nondiffracting beams carrying orbital angular momentum

Author: Ismail, Y ; Barnes, G ; Mhlanga, T ; Belyi, V ; Forbes, A Date: Mar 2010 In this paper the authors outline an optical design for producing high-order Bessel-like beams with a z-dependent cone angle through the use of conventional optical elements, without the need for deliberate aberrations to be included. Read more
Manipulating structured light

Author: Dudley, Angela L Date: Jul 2016 This presentation focuses on the manipulation of structured light. Structured light manipulation allows people to dynamical change the spatial profile of an optical field. Read more
Numerical modelling of a thin deformable mirror for laser beam control

Author: Long, Craig S ; Loveday, Philip W ; Forbes, A ; Land, K Date: Jan 2010 For intra-cavity laser beam control, a small, low-cost deformable mirror is required. This mirror can be used to correct for time- dependent phase aberrations to the laser beam, such as those caused by thermal expansion of materials. A ... Read more
Optical aberrations in a gas lenses

Author: Mafusire, C ; Forbes, A ; Michaelis, MM ; Snedden, Glen C Date: Aug 2010 Gas 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
Preliminary investigation into the simulation of a laser-induced plasma by means of a floating object in a spark gap

Author: West, NJ ; Jandrell, IR ; Forbes, A Date: Aug 2007 In this research, an orthogonally laser-triggered spark gap is investigated. The laser beam is directed in the region of a 30mm spark gap at 90 degrees to the gap and focused on the axis. The influence of plasma position within the spark gap ... Read more
Sorting and quantifying orbital angular momentum of laser beams

Author: Schulze, C ; Dudley, Angela L ; Flamm, D ; Duparr, M ; Forbes, A Date: Oct 2013 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. Read more
Wave aberrations in a spinning pipe gas lens

Author: Mafusire, C ; Forbes, A ; Michaelis, MM ; Snedden, Glen C Date: Jun 2009 The graded index (GRIN-like) medium generated by a gas inside a heated pipe when it is rotated about its longitudinal axis has the ability to focus a laser beam. However, recent research has shown that the medium generated has a deleterious ... Read more

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Browsing Conference Publications by Subject "Laser beams"

Browsing Conference Publications by Subject "Laser beams"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect