title: Dipole influence on Shack-Hartmann vortex detection in scintillated beams.
abstract: Optical vortices can appear in an optical beam that propagates over a long distance through a turbulent atmosphere. A Shack-Hartmann wavefront sensor can be used to detect such vortices. However, the morphology of these vortices, which changes with beam propagation, and nearby oppositely charged vortices will affect this vortex detection. The influence of the morphology and the separation distance from oppositely charged vortices on the Shack-Hartmann vortex detection is studied. Numerical simulations for vortex detection under these turbulent atmospheric circumstances are also provided.
authors.affiliation: Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Lynnwood Road, Pretoria 0002, South Africa.
authors.forename: Mingzhou
authors.initials: M
authors.lastname: Chen
authors.forename: Filippus S
authors.initials: FS
authors.lastname: Roux