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Browsing by Author "Aït-Ameur, K"

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Constructing “petal” modes from the coherent superposition of Laguerre-Gaussian modes

Author: Naidoo, Darryl ; Forbes, A ; Aït-Ameur, K ; Brunel, M Date: Jan 2011 An experimental approach in generating Petal-like transverse modes, which are similar to what is seen in porro-prism resonators, has been successfully demonstrated. We hypothesize that the petal-like structures are generated from a coherent ... 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
Intra-cavity generation of superpositions of Laguerre-Gaussian beams

Author: Naidoo, Darryl ; Aït-Ameur, K ; Brunel, M ; Forbes, A Date: 2012 In this paper we demonstrate experimentally the intra-cavity generation of a coherent superposition of Laguerre–Gaussian modes of zero radial order but opposite azimuthal order. The superposition is created with a simple intra-cavity stop ... Read more
Intra-cavity vortex beam generation

Author: Naidoo, Darryl ; Aït-Ameur, K ; Forbes, A Date: Aug 2011 In 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
Spatial properties of coaxial superposition of two coherent Gaussian beams

Author: Boubaha, B ; Naidoo, Darryl ; Godin, T ; Fromager, M ; Forbes, A ; Aït-Ameur, K Date: Aug 2013 In this paper, we explore theoretically and experimentally the laser beam shaping ability resulting from the coaxial superposition of two coherent Gaussian beams (GBs). This technique is classified under interferometric laser beam shaping ... Read more
Spatial superpositions of Gaussian beams

Author: Naidoo, Darryl ; Godin, T ; Fromager, M ; Aït-Ameur, K ; Forbes, A Date: Feb 2014 We explore an interferometric beam shaping technique that considers the coaxial superposition of two Gaussian beams. This technique is traditionally implemented in a Mach-Zehnder interferometer; however, to avoid phase shift drift due to ... 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
Transverse correlation vanishing due to phase aberrations

Author: Godin, T ; Forbes, A ; Naidoo, Darryl ; Fromager, M ; Cagniot, E ; Aït-Ameur, K Date: Jun 2011 The concept of transverse correlation vanishing, between the fraction of power contained in the centre and wings of a probe beam, recently introduced [Opt. Commun. 282 (2009) 3854–3858] is important to be considered when measuring the effective ... Read more
Transverse mode selection in a monolithic microchip laser

Author: Naidoo, Darryl ; Godin, T ; Fromager, M ; Cagniot, E ; Passilly, N ; Forbes, A ; Aït-Ameur, K Date: Nov 2011 The article outlines an approach to mode selection in a microchip laser through judicious shaping of the pump light to create a high modal overlap with the desired mode. The authors demonstrate the principle by creating a donut-shaped pump ... Read more

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Browsing by Author "Aït-Ameur, K"

Browsing by Author "Aït-Ameur, K"

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All of ResearchSpace

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