Generating a perfect optical vortex: comparison of approaches
A.A. Kovalev, V.V. Kotlyar, A.P. Porfirev

 

Image Processing Systems Institute оf RAS, – Branch of the FSRC “Crystallography and Photonics” RAS, Samara, Russia,
Samara National Research University, Samara, Russia

Full text of article: Russian language.

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Abstract:
We derived exact analytical relationships to describe the complex amplitude of a perfect optical vortex generated by means of three different optical elements, namely, (i) an amplitude-phase element with the transmission function proportional to a Bessel function, (ii) an optimal phase element with transmission equal to the sign function of a Bessel function, and (iii) a vortex axicon. The doughnut intensity was shown to be highest when using an optimal phase element. The vortex-axicon-aided intensity ring was found to be about twice as wide as when generated using two other elements under analysis. Thus, the optimal filter was shown to be best suited for generating a perfect optical vortex. Simulation results were shown to corroborate theoretical predictions, with the experiment being in agreement with theory and simulation.

Keywords:
perfect optical vortex, topological charge, radius and width of an intensity ring, Bessel mode, vortex axicon.

Citation:
Kotlyar VV, Kovalev AA, Porfirev AP. Generating a perfect optical vortex: comparison of approaches. Computer Optics 2016; 40(3): 312-321. DOI: 10.18287/2412-6179-2016-40-3-312-321.

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