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Browsing by Author "Bell, Teboho"

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Digital laser mode amplification using ND: YAG amplifier

Author: Bell, Teboho ; Ngcobo, Sandile Date: Jul 2016 In this paper we demonstrate the output power amplification of the generated higher-order modes from a digital laser by using an extra-cavity Nd: YAG amplifier. Read more
Discrete excitation of mode pulses using a diode-pumped solid-state digital laser

Author: Ngcobo, Sandile ; Bell, Teboho Date: Feb 2016 In this paper, we experimentally demonstrate novel method of generating discrete excitation of on-demand Lagaurre-Gaussian (LG) mode pulses, in a diode pumped solid-state digital laser. The digital laser comprises of an intra-cavity spatial ... Read more
Extra-cavity laser beam shaping using an Nd: YAG amplifier

Author: Bell, Teboho ; King, Gary ; Litvin, I Date: Feb 2020 This work proposes a method that can be used to control the transverse profile of the optical intensity distribution of a diode-end-pumped solid-state laser operating with a Gaussian seed beam. The transverse gain profie in an external amplifier ... Read more
Generating higher-order radial Laguerre-Gaussian modes using a digital laser

Author: Bell, Teboho ; Ngcobo, Sandile ; Haddadi, S ; Ait-Ameur, K ; Forbes, A Date: Jul 2015 Using the digital laser one can generate various types of modes, like, Laguerre-Gaussian modes. The digital laser was forced to generate high-order radial Laguerre-Gaussian modes, LGp , with zero azimuthal order, by loading a digital hologram ... Read more
Generation of Laguerre-Gaussian Beams Using a Diode Pumped Solid-State Digital Laser

Author: Bell, Teboho ; Forbes, A ; Ngcobo, Sandile Date: Oct 2015 The solid state digital laser was used in generation of Laguerre-Gaussian modes, LGpl, of different orders. This work demonstrates that we can generate high-order Laguerre-Gaussian modes with high purity using a digital laser. Read more
Generation of Radial Laguerre-Gaussian modes with a lower threshold using a digital laser

Author: Bell, Teboho ; Haddadi, S ; Ait-Ameur, K ; Forbes, A ; Ngcobo, Sandile Date: Jul 2015 This poster discusses the generation of Radial Laguerre-Gaussian modes with a lower threshold using a digital laser. Read more
Selective excitation of higher-radial-order Laguerre-Gaussian beams using a solid-state digital laser

Author: Bell, Teboho ; Ngcobo, Sandile Date: Jan 2017 In this paper, we use a digital laser to generate high-radial-order Laguerre-Gaussian, LGp,0 modes by loading digital holograms on a phase-only spatial light modulator that act as an end mirror of a diode-end-pumped laser resonator. The digital ... Read more c b d
Thermal lensing measurement from the coefficient of defocus aberration

Author: Bell, Teboho ; Forbes, A ; Ngcobo, Sandile ; Naidoo, Darryl Date: Mar 2016 We measured the thermally induced lens from the coefficient of defocus aberration using a Shack-Hartmann wavefront sensor (SHWFS). As a calibration technique, we infer the focal length of standard lenses probed by a collimated Gaussian beam ... Read more
Thermally induced lensing determination from the coefficient of defocus aberration

Author: Bell, Teboho ; Naidoo, Darryl ; Forbes, Andrew Date: Jul 2014 The effects of a temperature gradient in a laser crystal in an end-pumped configuration in a solid-state laser resonator results in thermally induced aberrations. Of particular interest we measure the thermally induced lens from the coefficient ... Read more

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Browsing by Author "Bell, Teboho"

Browsing by Author "Bell, Teboho"

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