Dividing the Topological Charge of a Laguerre-Gaussian Beam by 2 Using an Off-Axis Gaussian Beam.

Alexey A Kovalev, Victor V Kotlyar, Elena S Kozlova, Muhammad Ali Butt

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Article in Micromachines, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 authors.

Alexey A KovalevLaser Measurements Laboratory, Image Processing Systems Institute of the RAS-Branch of FSRC "Crystallography and Photonics" of the RAS, 151 Molodogvardeyskaya St., Samara 443001, Russia.ORCID 0000-0002-0488-4267

Victor V KotlyarLaser Measurements Laboratory, Image Processing Systems Institute of the RAS-Branch of FSRC "Crystallography and Photonics" of the RAS, 151 Molodogvardeyskaya St., Samara 443001, Russia.ORCID 0000-0003-1737-0393

Elena S KozlovaLaser Measurements Laboratory, Image Processing Systems Institute of the RAS-Branch of FSRC "Crystallography and Photonics" of the RAS, 151 Molodogvardeyskaya St., Samara 443001, Russia.

Muhammad Ali ButtTechnical Cybernetics Department, Samara National Research University, 34 Moskovskoe Shosse, Samara 443086, Russia.ORCID 0000-0003-0829-4886

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No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In optical computing machines, many parameters of light beams can be used as data carriers. If the data are carried by optical vortices, the information can be encoded by the vortex topological charge (TC). Thus, some optical mechanisms are needed for performing typical arithmetic operations with topological charges. Here, we investigate the superposition of a single-ringed (zero-radial-index) Laguerre-Gaussian (LG) beam with an off-axis Gaussian beam in the waist plane. Analytically, we derive at which polar angles intensity nulls can be located and define orders of the optical vortices born around these nulls. We also reveal which of the vortices contribute to the total TC of the superposition and which are compensated for by the opposite-sign vortices. If the LG beam has a TC of

Indexed as

Laguerre–Gaussian beamoff-axis Gaussian beamoptical vortextopological charge

Identifiers

PMID36296062

DOI10.3390/mi13101709

PMCPMC9608807

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