Browsing Conference Publications by Subject "Laser beam shaping"

Now showing items 1-11 of 11

Amplification of higher-order Poincaré sphere beams

Author: Naidoo, Darryl ; Sroor, H ; Litvin, I ; Forbes, A Date: Sep 2019 The Higher order Poincar´e sphere (HOPS) is generally used to describe scalar and vector orbital angular momentum modes. These modes have found many applications to date; however, they are limited to low power levels. It has thus become topical ... Read more
Digital control of laser modes with an intra-cavity spatial light modulator

Author: Ngcobo, Sandile ; Litvin, I ; Burger, L ; Forbes, A Date: Feb 2014 In this paper we outline a simple laser cavity which produces customised on-demand digitally controlled laser modes by replacing the end-mirror of the cavity with an electrically addressed reflective phase-only spatial light modulator as a ... Read more
Generating superpositions of higher order bessel beams [Conference paper]

Author: Vasilyeu, R ; Dudley, Angela L ; Khilo, N ; Forbes, A Date: Oct 2009 An experimental setup to generate a superposition of higher-order Bessel beams by means of a spatial light modulator and ring aperture is presented. The experimentally produced fields are in good agreement with those calculated theoretically. Read more
Higher-order Bessel like beams with z-dependent cone angles

Author: Ismail, Y ; Barnes, G ; Mhlanga, T ; Belyi, V ; Forbes, A Date: Aug 2010 As in the case of zero-order Bessel beam being produced by illuminating an axicon with a Gaussian beam, higher-order Bessel beams are generated by substituting the Gaussian beam with a Laguerre Gaussian (LG) beam. These beams hold similar ... Read more
Laser beam characterization with digital holograms

Author: Forbes, A ; Schulze, C ; Flamm, D ; Dudley, Angela L ; Duparre, M Date: Apr 2013 We 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
Laser beam shaping for studying thermally induced damage

Author: Masina, Bathusile N ; Bodkin, R ; Mwakikunga, Bonex W ; Forbes, A Date: Aug 2011 This paper presents an implementation of a laser beam shaping system for both heating a diamond tool and measuring the resulting temperature optically. The influence the initial laser parameters have on the resultant temperature profiles is ... Read more
Optical trapping with Super-Gaussian beams

Author: McLaren, M ; Khanyile, T ; Mthunzi-Kufa, Patience ; Forbes, A Date: Apr 2013 We outline the possibility of optical trapping and tweezing with Super-Gaussian beam profiles. We show that the trapping strength can be tuned continuously by adjusting the order of a Super-Gaussian beam, approaching that of a perfect Gaussian ... Read more
Simulating spontaneous parametric down-conversion using classical light: Conference paper

Author: Zhang, Y ; McLaren, M ; Roux, FS ; Forbes, A Date: Aug 2014 We present a simple way of simulating Spontaneous parametric down-conversion (SPDC) by modulating a classical laser beam with two spatial light modulators (SLM) through a back projection setup. This system has the advantage of having very ... Read more
Strong reducing of the laser focal volume

Author: Godin, T ; Ngcobo, Sandile ; Cagniot, E ; Fromager, M ; Forbes, A ; Aït-Ameur, K Date: Aug 2011 Many 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
Tuneable Gaussian to flat-top resonator by amplitude beam shaping using a digital laser

Author: Ngcobo, Sandile ; Ait-Ameur, K ; Litvin, I ; Hasnaoui, A ; Forbes, A Date: Feb 2014 In this paper we experimentally demonstrate a simple laser cavity that produces spatial tuneable laser modes from a Gaussian beam to a Flat-top beam and a Donut-beam. The laser cavity contains an opaque ring and an adjustable circular aperture ... Read more
Wavelength-independent laser beam shaping

Author: Degama, MP ; Forbes, A Date: Jul 2010 This paper presents a beam shaping device namely, a Diffractive Optical Element (DOE), which is used to change a beam having a Gaussian intensity profile into a beam with a uniform intensity profile. The DOE used in this work was fabricated ... Read more

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Browsing Conference Publications by Subject "Laser beam shaping"

Browsing Conference Publications by Subject "Laser beam shaping"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect