Dr. Lebohang T. Bell Profile

Dr. Lebohang T. Bell

Researcher at CSIR National Laser Ctr

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Publications (13)

Proceedings Article | 28 September 2023 Poster + Paper

Effect of astigmatism on the beam quality factor of Hermite-Gauss laser beams

Chemist Mabena, Nokwazi Mphuthi, Lebohang Bell, Darryl Naidoo

Proceedings Volume 12664, 126640L (2023) https://doi.org/10.1117/12.2677349

KEYWORDS: Monochromatic aberrations, Complex amplitude, Atmospheric propagation, Optical aberrations, Laser development, Laser beam propagation, Free space, Wave equations, Turbulence, Structured light

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Proceedings Article | 26 September 2023 Poster + Paper

Analytical analysis of the quality factor of quartically aberrated Laguerre-Gauss beams

Chemist Mabena, Teboho Bell, Nokwazi Mphuthi, Darryl Naidoo

Proceedings Volume 12667, 126670G (2023) https://doi.org/10.1117/12.2677337

KEYWORDS: Monochromatic aberrations, Analytical research, Structured light, Optical components, Beam analyzers, Digital signal processing, Complex amplitude, Chemical elements, Wave equations, Thermal effects

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Proceedings Article | 15 March 2023 Paper

Active control of focus position of laser beams using thermally induced lensing

Lebohang Bell, Chemist Mabena, Darryl Naidoo

Proceedings Volume 12407, 124070F (2023) https://doi.org/10.1117/12.2650353

KEYWORDS: Solid state lasers, Thermal lensing, Thermal optics, Beam diameter, Temperature distribution, Manufacturing, Refractive index, High power lasers

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Proceedings Article | 8 March 2023 Presentation + Paper

Modelling the effect of astigmatism on the beam quality factor of Laguerre-Gaussian optical beams

Chemist Mabena, Teboho Bell, Darryl Naidoo

Proceedings Volume 12399, 123990H (2023) https://doi.org/10.1117/12.2650192

KEYWORDS: Structured light, High power lasers, Thermal effects, Numerical simulations, Integral transforms, Finite element methods

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Proceedings Article | 4 March 2022 Poster + Presentation + Paper

Intracavity beam shaping using digital holograms in continuous-wave-diode-pumped Nd: YAG laser module

Teboho Bell, Chemist Mabena, Sandile Ngcobo

Proceedings Volume 11980, 1198009 (2022) https://doi.org/10.1117/12.2609630

KEYWORDS: Digital holography, Holograms, Beam shaping, YAG lasers, Spatial light modulators, Laser applications, Solid state lasers, Resonators

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Proceedings Article | 2 March 2020 Paper

Extra-cavity laser beam shaping using an Nd: YAG amplifier

Teboho Bell, Gary King, Igor Litvin

Proceedings Volume 11266, 112661D (2020) https://doi.org/10.1117/12.2543370

KEYWORDS: Beam shaping, Gaussian beams, Nd:YAG lasers, Optical amplifiers, Neodymium, Semiconductor lasers, Diodes, Laser resonators, YAG lasers, Amplifiers

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Proceedings Article | 4 March 2019 Paper

Corroboration of a multi-phase screen model

Chemist Mabena, Teboho Bell, Filippus Roux

Proceedings Volume 10910, 109101T (2019) https://doi.org/10.1117/12.2510003

KEYWORDS: Atmospheric propagation, Turbulence, Surface plasmons, Numerical simulations, Atmospheric turbulence, Scintillation, Atmospheric optics, Atmospheric modeling, Photons, Telecommunications

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Proceedings Article | 4 March 2019 Presentation + Paper

Intracavity second harmonic generation for higher-order laser modes

Teboho Bell, Sandile Ngcobo

Proceedings Volume 10904, 109041P (2019) https://doi.org/10.1117/12.2507884

KEYWORDS: Ferroelectric materials, Crystals, Nonlinear crystals, Modes of laser operation, Laser crystals, Second-harmonic generation, Harmonic generation, Laser resonators, Digital holography, Neodymium

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Proceedings Article | 22 April 2016 Paper

Thermal lensing measurement from the coefficient of defocus aberration using Shack-Hartmann wavefront sensor

Teboho Bell, Darryl Naidoo, Sandile Ngcobo, Andrew Forbes

Proceedings Volume 9727, 97271L (2016) https://doi.org/10.1117/12.2205141

KEYWORDS: Wavefront sensors, Solid state lasers, Nd:YAG lasers, Laser resonators, Resonators, Collimation, Gaussian beams, Laser beam diagnostics, Mirrors, Crystals, Calibration, Laser crystals, Wavefronts

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Proceedings Article | 22 April 2016 Paper

Intracavity generation of low-loss radial-order Laguerre-Gaussian modes using digital holograms

Teboho Bell, Kamel Äit-Ameur, Andrew Forbes, Sandile Ngcobo

Proceedings Volume 9727, 97271K (2016) https://doi.org/10.1117/12.2199421

KEYWORDS: Digital holography, Holograms, Resonators, Laser resonators, Spatial light modulators, Solid state lasers, Semiconductor lasers, Nd:YAG lasers, Gaussian beams

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Proceedings Article | 22 April 2016 Paper

Discrete excitation of mode pulses using a diode-pumped solid-state digital laser

Sandile Ngcobo, Teboho Bell

Proceedings Volume 9727, 97271J (2016) https://doi.org/10.1117/12.2214567

KEYWORDS: Solid state lasers, Solid state physics, Semiconductor lasers, Diode pumped solid state lasers, Q switches, Modes of laser operation, Digital holography, Laser resonators, Resonators, Holograms, Spatial light modulators, Pulsed laser operation, Mode locking

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Proceedings Article | 25 August 2015 Paper

Low-loss selective excitation of higher-order modes in a diode-pumped solid-state digital laser

Sandile Ngcobo, Teboho Bell, Kamel Ait-Ameur, Andrew Forbes

Proceedings Volume 9581, 95810S (2015) https://doi.org/10.1117/12.2195751

KEYWORDS: Digital holography, Laser resonators, Holograms, Spatial light modulators, Solid state lasers, Solid state physics, Semiconductor lasers, Laser damage threshold, Resonators, Holography

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Proceedings Article | 25 August 2015 Paper

Selective excitation and detection of higher-order doughnut laser modes as an incoherent superposition of two petals modes in a digital laser resonator

Sandile Ngcobo, Teboho Bell, Igor Litvin, Darryl Naidoo, Kamel Ait-Ameur, Andrew Forbes

Proceedings Volume 9581, 95810B (2015) https://doi.org/10.1117/12.2187892

KEYWORDS: Superposition, Laser resonators, Digital holography, Mirrors, Modes of laser operation, Spatial light modulators, Resonators, Holograms, Beam propagation method, Opacity

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Showing 5 of 13 publications

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