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Browsing by Subject "Flat-top beams"

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Gaussian mode selection with intracavity diffractive optics

Author: Litvin, IA ; Forbes, A Date: Oct 2009 The authors outline a resonator design that allows for the selection of a Gaussian mode by diffractive optical elements. This is made possible by the metamorphosis of a Gaussian beam into a flat-top beam during propagation from one end of the ... 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
High power infrared super-Gaussian beams: generation, propagation and application

Author: Du Preez, NC ; Forbes, A ; Botha, LR Date: Sep 2009 In this paper researchers present the design of a CO2 laser resonator that produces as the stable transverse mode a super–Gaussian laser beam. The resonator makes use of an intra–cavity diffractive mirror and a flat output coupler, generating ... Read more
Intra-cavity metamorphosis of a Gaussian beam to flat-top distribution

Author: Naidoo, Darryl ; Litvin, I ; Laskin, A ; Forbes, A Date: Feb 2014 We explore an intra-cavity beam shaping approach to generate a Gaussian distribution by the metamorphosis of a Gaussian beam into a flat-top distribution on opposing mirrors. The concept is tested external to the cavity through the use of two ... Read more
Intracavity mode competition between classes of flat–top beams

Author: Litvin, IA ; Loveday, Philip W ; Long, Craig S ; Kazak, NS ; Belyi, V ; Forbes, A Date: Aug 2008 There are many applications in which a laser beam with a flat–top intensity profile would be ideal, as compared to a laser beam with a non–uniform energy distribution. Standard stable optical resonators will unfortunately not generate such a ... Read more
Intra–cavity flat–top beam generation

Author: Litvin, IA ; Forbes, A Date: Aug 2009 In this paper the authors present the analytical and numerical analyses of two new resonator systems for generating flat–top–like beams. Both approaches lead to closed form expressions for the required cavity optics, but differ substantially ... Read more
Paint stripping with high power flattened Gaussian beams

Author: Forbes, A ; Du Preez, NC ; Belyi, VN ; Botha, LR Date: Aug 2009 In this paper the researchers present results on improved paint stripping performance with an intra-cavity generated Flattened Gaussian Beam (FGB). A resonator with suitable diffractive optical elements was designed in order to produce a ... Read more
Thermally induced damage studies with shaped light

Author: Masina, Bathusile N ; Mwakikunga, Bonex W ; Forbes, A Date: Apr 2013 We outline an all-optical and noncontact approach for controlled laser heating and measurement of the resultant temperature distribution at the surface of a material, respectively. We show how the boundary conditions of the heating problem ... Read more

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Browsing by Subject "Flat-top beams"

Browsing by Subject "Flat-top beams"

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