A Fourier-invariant squared Laguerre-Gaussian vortex beam

• Published in: Kompʹûternaâ optika Vol. 47; no. 3; pp. 367 - 373
• Main Authors: Kozlova, E.S., Savelyeva, A.A., Kovalev, A.A., Kotlyar, V.V.
• Format: Journal Article
• Language: English
• Published: Samara National Research University 01.06.2023
• Subjects: fourier invariance; fourier transform; fresnel diffraction; laguerre-gauss mode; optical vortex; topological charge

It is shown that a squared Laguerre-Gaussian (LG) vortex beam is Fourier-invariant and retains its structure at the focus of a spherical lens. In the Fresnel diffraction zone, such a beam is transformed into superposition of conventional LG beams, the number of which is equal to the number of rings...