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Laser physics and technology

 

News

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

  • Sephton, Bereneice C; Dudley, Angela L; Forbes, A (Optical Society of America, 2016-10)
    Light beams that carry orbital angular momentum are often approximated by modulating an initial beam, usually Gaussian, with an azimuthal phase variation to create a vortex beam. Such vortex beams are well defined azimuthally, ...
  • Vetter, C; Dudley, Angela L; Szameit, A; Forbes, A (Optical Society of America (OSA), 2017-08)
    Accelerating waves have received significant attention of late, first in the optical domain and later in the form of electron matter waves, and have found numerous applications in non-linear optics, material processing, ...
  • Uhrich, P; Castrignano, S; Uys, Hermann; Kastner, M (American Physical Society, 2017-08)
    The measurement of dynamic correlation functions of quantum systems is complicated by measurement backaction. To facilitate such measurements we introduce a protocol, based on weak ancilla-system couplings, that is applicable ...
  • Bassa, H; Konrad, T; Diósi, L; Uys, Hermann (Elsevier, 2017-08)
    We study the convergence properties of state estimates of an oscillating qubit being monitored by a sequence of discrete, unsharp measurements. Our method derives a differential equation determining the evolution of the ...
  • Maphanga, Charles P; Ombinda-Lemboumba, Saturnin; Manoto, Sello L; Maaza, Malik; Mthunzi-Kufa, Patience (SPIE, 2017-01)
    Human immunodeficiency virus (HIV-1) infection still remains one amongst the world’s most challenging infections since its discovery. Antiretroviral therapy is the recommended treatment of choice for HIV-1 infection taken ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (Wiley, 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 ...
  • Maphanga, Charles P; Malabi, Rudzani; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (SPIE, 2017-02)
    The delivery of genetic material and drugs into mammalian cells using femtosecond (fs) laser pulses is escalating rapidly. This novel light based technique achieved through a precise focusing of a laser beam on the plasma ...
  • Malabi, Rudzani; Manoto, Sello L; Maaza, M; Mthunzi-Kufa, Patience; Ombinda-Lemboumba, Saturnin (2017-01)
    The objectives of this study are to use femtosecond laser pulses in a photo-translocation system to deliver ARVs into HIV infected TZMbl cells, and to investigate the influence of ARVs and laser on cellular processes using ...
  • 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.

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