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Structured light transformations and orbital angular momentum control in a three-coil optical snake
C.N. Alexeyev 1, S.S. Aliyeva 1, E.V. Barshak 1, B.P. Lapin 1, M.A. Yavorsrky 1

1 V.I. Vernadsky Crimean Federal University, 295000, Simferopol, Russia, Prospekt Vernadskogo 4

 PDF, 1424 kB

DOI: 10.18287/2412-6179-CO-1121

Pages: 701-712.

Full text of article: Russian language.

Abstract:
In this paper, we studied transformations of structured light and its angular momentum in a three-coil optical snake – a coil resonator composed of 3 evanescently uniformly coupled coils of a multimode fiber. We have suggested a fully vectorial theory of normal modes of the 3-coil resona-tor, which takes account of the spin-orbit interaction. On the basis of the analytical expressions for such normal modes and their propagation constants we have studied transmission of some types of structured light beams – optical vortices, Hermite-Gaussian-like and Laguerre-Gaussian beams – through such a system. We have shown the possibility of a super-efficient parametric control over the topological charge, orbital and spin angular momenta of the outcoming optical field by this system. We have theoretically demonstrated implementation of logic X and Y Pauli gates for light beams carrying orbital angular momentum on the basis of such a 3-coil resonator.

Keywords:
coupled fibers, microcoil fiber resonator, structured light, optical snake, optical vortex conversion, Pauli gate.

Citation:
Alexeyev CN, Alieva SS, Barshak EV, Lapin BP, Yavorsky MA. Structured light transformations and orbital angular momentum control in a three-coil optical snake. Computer Optics 2022; 46(5): 701-712. DOI: 10.18287/2412-6179-CO-1121.

Acknowledgements:
This work was funded by the Russian Science Foundation under Grant 20-12-00291.

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