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This article is cited in 3 scientific papers (total in 3 papers)
DIFFRACTIVE OPTICS, OPTICAL TECHNOLOGIES
Topological charge of a superposition of identical parallel single-ringed Laguerre-Gaussian beams
V. V. Kotlyarab, A. A. Kovalevab, A. A. Savelyevaab a Image Processing Systems Institute of the RAS - Branch of the FSRC "Crystallography and Photonics" RAS, Samara, Russia, Samara
b Samara National Research University
Abstract:
We study a superposition of several identical parallel single-ringed Laguerre-Gaussian beams. Both for the initial plane and for the far field, we show analytically and confirm numerically that if the weighting coefficients of the superposition are real-valued (i.e. all the beams have the same phase, but may have different amplitudes), the net topological charge of the superposition is equal to the topological charge of each constituent beam. It is also shown that a phase delay between the beams allows changing the net topological charge of the superposition. By measuring the net topo-logical charge it is possible to analyze the received optical signal in a data transmission system that utilizes vortex beams, combining spatial multiplexing and orbital angular momentum multiplexing.
Keywords:
topological charge, Laguerre-Gaussian beam, superposition of parallel beams
Received: 15.12.2021 Accepted: 06.01.2022
Citation:
V. V. Kotlyar, A. A. Kovalev, A. A. Savelyeva, “Topological charge of a superposition of identical parallel single-ringed Laguerre-Gaussian beams”, Computer Optics, 46:2 (2022), 184–188
Linking options:
https://www.mathnet.ru/eng/co1005 https://www.mathnet.ru/eng/co/v46/i2/p184
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