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- Cosmas Mafusire, Andrew Forbes
- Journal of the Optical Society of America. A…
- 2011

We outline a theory for the calculation of the beam quality factor of an aberrated laser beam. We provide closed-form equations that show that the beam quality factor of an aberrated Gaussian beam… (More)

- Max M. Michaelis, Cosmas Mafusire, Jan-Hendrik Grobler, Andrew Forbes
- Nature communications
- 2013

The lens is a well-understood optical component used for focusing light, but is almost exclusively made in the solid-state form and, thus, suffers from optical damage at high powers. Attempts to… (More)

- Cosmas Mafusire, Andrew Forbes
- Journal of the Optical Society of America. A…
- 2011

We outline an approach for the calculation of the mean focal length of an aberrated lens and provide closed-form solutions that show that the focal length of the lens is dependent on the presence of… (More)

- Cosmas Mafusire, Andrew Forbes, Max M. Michaelis, Glen C. Snedden
- Optics express
- 2008

If a heated pipe is rotated about its axis, a density gradient is formed which results in the pipe acting as a graded index lens. In this study we revisit the concept of a spinning pipe gas lens and… (More)

- Cosmas Mafusire, Tjaart P J Krüger
- Applied optics
- 2017

The concept of orthonormal polynomials is revisited by developing a Zernike-based orthonormal set for a non-circular pupil that is transmitting an aberrated, non-uniform field. We refer to this pupil… (More)

The orbital angular momentum of light has been suggested as a means of information transfer over free-space, yet the detected optical vortex is known to be sensitive to perturbation. Such effects… (More)

- Cosmas Mafusire, Andrew Forbes
- Journal of the Optical Society of America. A…
- 2011

A correction is given for Eqs. (10a) and (10b) [J. Opt. Soc. Am. A28, 1372 (2011)JOAOD60740-323210.1364/JOSAA.28.001372].

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… (More)

54th Annual Conference of the South African Institute of Physics (SAIP), Durban, South Africa, 6-10 July 2009

- Cosmas Mafusire, Tjaart P J Krüger
- Journal of the Optical Society of America. A…
- 2018

The concept of orthonormal vector circle polynomials is revisited by deriving a set from the Cartesian gradient of Zernike polynomials in a unit circle using a matrix-based approach. The heart of… (More)