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Browsing by Author "Ait-Ameur, K"

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Observing mode propagation inside a laser cavity

Author: Naidoo, Darryl ; Ait-Ameur, K ; Litvin, I ; Fromager, M ; Forbes, A Date: May 2012 The mode inside a laser cavity may be understood as the interference of two counter-propagating waves, referred to as the forward and backward waves, respectively. We outline a simple experimental procedure, which does not require any additional ... Read more
Selection of a LGp0-shaped fundamental mode in a laser cavity: Phase versus amplitude masks

Author: Hasnaoui, A ; Godin, T ; Cagniot, E ; Fromager, M ; Forbes, A ; Ait-Ameur, K Date: 2012 Laser beams of a single high-order transverse mode have been of interest to the laser community for several years now. In order to achieve such a mode as the fundamental mode of the cavity, mode selecting elements in the form of a phase or ... Read more
Superresolution beams

Author: Ngcobo, Sandile ; Ait-Ameur, K ; Forbes, A Date: Nov 2011 The transformation of a Gaussian beam (GB) into a symmetrical higher order TEMp0 Laguerre Gaussian beam (LGB) intensity distribution of which is further rectified and transformed into a Gaussian intensity distribution in the plane of a ... Read more
Superresolution beams

Author: Ngcobo, Sandile ; Forbes, A ; Ait-Ameur, K ; Mhlanga, T Date: Jul 2012 The transformation of a Gaussian beam into a symmetrical TEMp0 Laguerre Gaussian beam (LGB) intensity distribution which has transverse superresolution properties is very useful in improving the spatial resolution of optical imaging microscopes ... Read more
Tuneable Gaussian to flat-top resonator by amplitude beam shaping

Author: Ngcobo, Sandile ; Ait-Ameur, K ; Litvin, I ; Hasnaoui, A ; Forbes, A Date: Sep 2013 We outline a simple laser cavity comprising an opaque ring and a circular aperture that is capable of producing spatially tuneable laser modes, from a Gaussian beam to a Flat-top beam. The tuneability is achieved by varying the diameter 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

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Browsing by Author "Ait-Ameur, K"

Browsing by Author "Ait-Ameur, K"

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