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Journal = Photonics
Section = Classical Optics

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21 pages, 4301 KiB  
Article
Off-Axis Vortex Beam Propagation through Classical Optical System in Terms of Kummer Confluent Hypergeometric Function
by Ireneusz Augustyniak, Weronika Lamperska, Jan Masajada, Łukasz Płociniczak and Agnieszka Popiołek-Masajada
Photonics 2020, 7(3), 60; https://doi.org/10.3390/photonics7030060 - 15 Aug 2020
Cited by 13 | Viewed by 4086
Abstract
The analytical solution for the propagation of the laser beam with optical vortex through the system of lenses is presented. The optical vortex is introduced into the laser beam (described as Gaussian beam) by spiral phase plate. The solution is general as it [...] Read more.
The analytical solution for the propagation of the laser beam with optical vortex through the system of lenses is presented. The optical vortex is introduced into the laser beam (described as Gaussian beam) by spiral phase plate. The solution is general as it holds for the optical vortex of any integer topological charge, the off-axis position of the spiral phase plate and any number of lenses. Some intriguing conclusions are discussed. The higher order vortices are unstable and split under small phase or amplitude disturbance. Nevertheless, we have shown that off-axis higher order vortices are stable during the propagation through the set of lenses described in paraxial approximation, which is untypical behavior. The vortex trajectory registered at image plane due to spiral phase plate shift behaves like a rigid body. We have introduced a new factor which in our beam plays the same role as Gouy phase in pure Gaussian beam. Full article
(This article belongs to the Section Classical Optics)
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