Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Intensity-based measuring of the topological charge alteration by the diffraction of vortex beams from amplitude sinusoidal radial gratings

Not Accessible

Your library or personal account may give you access

Abstract

For convenient optical communications by the aid of vortex beams, topological charge (TC) alterations should be translated to the change in intensity of the output light. In this paper, we formulate and experimentally investigate diffraction of vortex beams from amplitude radial gratings having sinusoidal profiles. We show that the diffraction pattern simply renders both TC and twist direction of the impinging vortex beam. When the TC of the vortex beam and the radial grating spoke number are equal, intensity on the optical axis of the Fraunhofer pattern gets a maximum value. Otherwise, its value on the optical axis remains zero. We examined the method on different vortex beams; the measured TCs of generated beams are in excellent agreement with the expected values. We show that an alteration between two vortex beams, in which one has a TC equal to the grating spoke number, is translated to a binary change in intensity of the output light on the optical axis. This feature might find wide applications in optical communications.

© 2018 Optical Society of America

Full Article  |  PDF Article
More Like This
Characterization of a pair of superposed vortex beams having different winding numbers via diffraction from a quadratic curved-line grating

Saifollah Rasouli, Pouria Amiri, Victor V. Kotlyar, and Alexey A. Kovalev
J. Opt. Soc. Am. B 38(8) 2267-2276 (2021)

Talbot carpet at the transverse plane produced in the diffraction of plane wave from amplitude radial gratings

Saifollah Rasouli, Ali Mohammad Khazaei, and Davud Hebri
J. Opt. Soc. Am. A 35(1) 55-64 (2018)

Gaussian beam diffraction from radial structures: detailed study on the diffraction from sinusoidal amplitude radial gratings

Razieh Azizkhani, Davud Hebri, and Saifollah Rasouli
Opt. Express 31(13) 20665-20682 (2023)

Supplementary Material (1)

NameDescription
Visualization 1       Calculated diffraction patterns from an amplitude radial grating with m=10 illuminated by the vortex beams with w=2 mm and l= 3, 10 at different propagation distances in the range from z=0 to z=10z_T.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (26)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved