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Laser physics and technology

 

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CSIR Research Space is constantly being developed and populated. Please report any errors to Siphethile Muswelanto. Constructive criticism and suggestions would be welcome.

Recent Submissions

  • Ombinda-Lemboumba, Saturnin; Malabi, Rudzani; Lugongolo, Masixole Y; Thobakgale, Setumo L; Manoto, Sello L; Mthunzi-Kufa, Patience (SPIE, 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 ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (SPIE, 2017-01)
    Human immunodeficiency virus (HIV-1) infection remains a major health problem despite the use of highly active antiretroviral therapy (HAART), which has greatly reduced mortality rates. Due to the unavailability of an ...
  • Malabi, Rudzani; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (SPIE, 2017-01)
    The current human immunodeficiency virus (HIV) treatment regime possesses the ability to diminish the viral capacity to unnoticeable levels; however complete eradication of the virus cannot be achieved while latent HIV-1 ...
  • Rosales-Guzmán, C; Trichili, A; Dudley, Angela L; Ndagano, B; Salem, AB (Optical Society of America (OSA), 2016-10)
    By combining both the azimuthal and radial components of Laguerre-Gaussian modes with wavelength division multiplexing, we generated >100 information channels. We implemented a laboratory free-space link using 35 ...
  • Naidoo, Darryl; Roux, FS; Dubery, Angela L; Litvin, Ihar; Piccirillo, B (Optical Society of America (OSA), 2016-10)
    We introduce a laser for generating all states on the Higher-order Poincaré sphere by coupling spin angular momentum to orbital angular momentum and we demonstrate that the OAM degeneracy of a laser may be broken.
  • Maweza, Elijah L; Gailele, Lucas M; Strauss, Hencharl J; Litvin, Ihar; Forbes, A; Dudley, Angela L (Optical Society of America (OSA), 2016-10)
    We demonstrate the operation and calibration of a spatial light modulator in the mid-IR region by creating and measuring the modal content and wavefront of structured light fields at 2um for the first time.
  • Sephton, Bereneice C; Dudley, Angela L; Forbes, A (Optical Society of America (OSA), 2016-10)
    Q-plates are commonly used for uncomplicated generation of polarization controlled vortex beams. Here we show experimentally that the output is not a pure vortex but rather a Hypergeometric-Gaussian mode. Results are in ...
  • Dudley, Angela L; Naidoo, Darryl; Forbes, A (SPIE, 2016-09)
    We show how one can determine the various properties of light, from the modal content of laser beams to decoding the information stored in optical fields carrying orbital angular momentum, by performing a modal decomposition. ...
  • Bell, Teboho; Ngcobo, Sandile (2016-07)
    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.
  • Bell, Teboho; Haddadi, S; Ait-Ameur, K; Forbes, A; Ngcobo, Sandile (2015-07)
    This poster discusses the generation of Radial Laguerre-Gaussian modes with a lower threshold using a digital laser.
  • Bell, Teboho; Ngcobo, Sandile; Haddadi, S; Ait-Ameur, K; Forbes, A (2015-07)
    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 ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Mthunzi-Kufa, Patience (Optical Society of America (OSA), 2016-10)
    HIV-1 epidemic remains a major health challenge. This study explores the effects of low level laser therapy on HIV-1 infected cells. Infection is reduced by irradiation and the mechanism needs to be investigated further.
  • Bell, Teboho; Forbes, A; Ngcobo, Sandile (2015-10)
    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.
  • Ngcobo, Sandile; Bell, Teboho (2016-02)
    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 ...
  • Bell, Teboho; Forbes, A; Ngcobo, Sandile; Naidoo, Darryl (2016-03)
    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 ...
  • Untitled 
    Manoto, Sello L; Oluwole, DO; Malabi, Rudzani; Maphanga, Charles P; Ombinda-Lemboumba, Saturnin; Nyokong, T; Mthunzi-Kufa, Patience (SPIE, 2017-02)
    Photodynamic therapy (PDT) is a minimally invasive therapeutic modality for the treatment of neoplastic and non-neoplastic diseases. In PDT of cancer, irradiation with light of a specific wavelength leads to activation of ...
  • Dudley, Angela L; Rosales-Guzman, C; Trichilli, A; Forbes, A (SPIE, 2017-01)
    We implement digital holograms for the creation and detection of the spatial modes of light. We make use of modal decomposition theory to determine the numerous properties of light, from the modal content of laser beams ...
  • Gailele, Lucas M; Maweza, Elijah L; Dudley, Angela L; Ndagano, B; Rosales-Guzman, C; Forbes, A (SPIE, 2017-02)
    Traditional optical communication systems optimize multiplexing in polarization and wavelength both transmitted in fiber and free-space to attain high bandwidth data communication. Yet despite these technologies, we are ...
  • 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 ...

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