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Laser technology

 

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  • Ombinda-Lemboumba, Saturnin; Malabi, Rudzani; Lugongolo, Masixole Y; Thobakgale, Setumo L; Manoto, Sello L; Mthunzi-Kufa, Patience (2017-02)
    Optical trapping has emerged as an essential tool for manipulating single biological material and performing sophisticated spectroscopy analysis on individual cell. The optical trapping technique has been used to grab and ...
  • Naidoo, Darryl; Roux, Filippus S; Dudley, Angela; Litvin, Igor; Piccirillo, B; Marrucci, L; Forbes, A (Nature Publishing Group, 2016-03)
    The angular momentum of light can be described by positions on a higher-order Poincaré sphere, where superpositions of spin and orbital angular momentum states give rise to laser beams that have many applications, from ...
  • Trichili, A; Salem, AB; Dudley, Angela; Zghal, M; Forbes, A (Optical Society of America, 2016-07)
    We experimentally demonstrate an efficient information transmission technique using Laguerre Gaussian (LG) modes. This technique is based on multiplexing and demultiplexing multiple LG modes with different azimuthal and ...
  • Forbes, A; Dudley, Angela; McLaren, M (Optical Society of America, 2016-06)
    Modal decomposition of light has been known for a long time, applied mostly to pattern recognition. With the commercialization of liquid-crystal devices, digital holography as an enabling tool has become accessible to all, ...
  • Sephton, Bereneice; Dudley, Angela; Forbes, A (2016-07)
    Q-plates (QP) have become ubiquitous in experiments requiring the generation of vortex beams since its development in 2006. It consequently follows that it is important to characterize the vortex beams created by this ...
  • Gailele, Lucas M; Dudley, Angela; Ndagano, B; McLaren M, M; Rosales, C; Forbes, A (2016-07)
    The orbital angular momentum (OAM) of light has become the focus of intensive research. Traditional optical communication systems optimize multiplexing in the polarization and the wavelength of light to attain an increase ...
  • Mredlana, Prince; Naidoo, Darryl; Mafusire, C; Kruger, T; Dudley, Angela; Forbes, A (2016-07)
    Optical field characterisation often requires various isolated experiments to obtain characterisation parameters, we investigate a novel approach to characterise an optical field employing a Wigner distribution function ...
  • Dudley, Angela (2016-07)
    This presentation focuses on the manipulation of structured light. Structured light manipulation allows people to dynamical change the spatial profile of an optical field.
  • Rosales-Guzman, C; Trichili, A; Dudley, Angela; Ndagano, B; Salem, AB; Zghal, Mourad; Forbes, A (SPIE, 2016-09)
    Current optical communication technologies are predicted to face a bandwidth capacity limit in the near future. The nature of the limitation is fundamental rather than technological and is set by nonlinearities in optical ...
  • Masina, Bathusile N; Forbes, Andrew; Mwakikunga, Bonex W; Bodkin, R (2011-05)
    At present it is known that diamond tools degrade with time as it is normally used at high temperatures. One of the questions the authors like to answer in this study is whether thermally induced problems in diamond tool ...
  • Erinosho, MF; Akinlabi, ET; Pityana, Sisa L (IGI Global, 2016-04)
    The laser metal deposition process possesses the combination of metallic powder and laser beam respectively. However, these combinations create an adhesive bonding that permanently solidifies the laser-enhanced-deposited ...
  • Adebiyi, ID; Popoola, PAP; Pityana, Sisa L (IGI Global, 2016-04)
    Today's increasingly extreme and aggressive production environments require that machine components be made with materials having specific surface properties such as good wear resistance. Unfortunately, nature does not ...
  • Fatoba, OS; Farotade, GA; Popoola, API; Pityana, Sisa L (IGI Global, 2016-04)
    Laser alloying is a material processing method which utilizes the high power density available from defocused laser beam to melt both metal coatings and a part of the underlying substrate. Since melting occur solitary at ...
  • Bell, Teboho; Naidoo, Darryl; Forbes, Andrew (2014-07)
    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 ...
  • Sharma, Ameeth; Singh, Ann; Roberts, Ted; Ramokolo, Rocky; Van der Westhuizen, Corrie (CSIR, 2016-11)
    The optical coherence technique (OCT) technique, which was demonstrated by Fercher and Huang in the early 90s, has made significant strides in bio-medical diagnostic applications in the fields of dermatology, dentistry and ...
  • Sharma, Ameeth (South African Institute of Physics (SAIP), 2016-07)
    Light based techniques continue to gain momentum in different spheres of diagnostic and therapeutic applications as a result of their non-invasive, noncontact properties. One such technique is Optical Coherence tomography ...
  • Tlotleng, Monnamme; Masina, Bathusile; Pityana, Sisa L (Elsevier, 2017-01)
    The use of titanium aluminides as high temperature materials in the aerospace and automobile industries is becoming a reality since their early research and development in 1955. Their mechanical properties at elevated ...
  • Ndou, N; Akinlabi, ET; Pityana, Sisa L; Shongwe, MB (International Association of Engineers (IAENG), 2016-10)
    The study of laser power on the deposited of Ti64l4V/W was investigated. The laser metal deposition technique has proven to be a process that is sustainable. The microstructure and microhardness properties of a Tungsten ...
  • Bayode, A; Pityana, Sisa L; Akinlabi, ET (International Association of Engineers (IAENG), 2016-10)
    Laser metal deposition (LMD) is an additive manufacturing process. Unlike conventional manufacturing process which is subtractive, LMD produces part layer by layer from the ground up and has been used to fabricate fully ...
  • Trichili, A; Rosales-Guzmán, C; Dudley, Angela; Ndagano, B; Salem, AB; Zghal, M; Forbes, A (Macmillan Publishers Limited, part of Springer Nature, 2016-06)
    Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase ...

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