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Browsing by Subject "Beams"

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Intra-cavity vortex beam generation

Author: Naidoo, Darryl ; Aït-Ameur, K ; Forbes, A Date: Aug 2011 In this paper the authors explore vortex beams and in particular the generation of single LG0l modes and superpositions thereof. Vortex beams carry orbital angular momentum (OAM) and this intrinsic property makes them prevalent in transferring ... Read more
Intra–cavity generation of Bessel–like beams with longitudinally dependent cone angles

Author: Litvin, IA ; Khilo, NA ; Forbes, A ; Belyi, VN Date: Feb 2010 The authors report on two resonator systems for producing Bessel–like beams with longitudinally dependent cone angles (LDBLBs). Such beams have extended propagation distances as compared to conventional Bessel– Gauss beams, with a far field ... Read more
Method of electronic beam steering for circular switched parasitic dipole arrays

Author: Mofolo, M ; Lysko, Albert A ; Clarke, W Date: Sep 2010 This paper presents a method of electronic beam steering for a smart antenna system based on a switched parasitic array. The antenna system is made up of circular array of half wave dipoles, with four parasitic elements positioned equidistantly, ... Read more
Twisted light

Author: Forbes, A ; Dudley, Angela L ; Roux, S Date: Dec 2010 Research at the Mathematical Optics Group uses "twisted" light to study new quatum-based information security systems. In order to understand the structure of "twisted" light, it is useful to start with an ordinary light beam with zero twist, ... Read more

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Browsing by Subject "Beams"

Browsing by Subject "Beams"

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