Romanian Journal of Information Science and Technology (ROMJIST)

An open – access publication

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ROMJIST is a publication of Romanian Academy,
Section for Information Science and Technology

Editor – in – Chief:
Radu-Emil Precup

Honorary Co-Editors-in-Chief:
Horia-Nicolai Teodorescu
Gheorghe Stefan

Secretariate (office):
Adriana Apostol
Adress for correspondence: romjist@nano-link.net (after 1st of January, 2019)

Founding Editor-in-Chief
(until 10th of February, 2021):
Dan Dascalu

Editing of the printed version: Mihaela Marian (Publishing House of the Romanian Academy, Bucharest)

Technical editor
of the on-line version:
Lucian Milea (University POLITEHNICA of Bucharest)

Sponsor:
• National Institute for R & D
in Microtechnologies
(IMT Bucharest), www.imt.ro

ROMJIST Volume 28, No. 2, 2025, pp. 173-184, DOI: 10.59277/ROMJIST.2025.2.05
 

George Andrei BULZAN, Roxana REBIGAN, Mihai KUSKO, Rebeca TUDOR, Cristian KUSKO
Separation of Different Orbital Angular Momentum Photon States with Log-pol Transformation

ABSTRACT: An optical vortex undergoing a logarithmic – polar transformation is unwrapped from a ring – like shape to a straight line segment whose tilt is determined by the order of the vortex. Due to this property, components with continuous optical surface performing logarithmic – polar transformation are employed for the optical vortices sorting as a function of their orders. In this work we show that a logarithmic – polar component with its optical surface approximated by four discrete levels performs with a good approximation the same transformation of the optical vortices.

KEYWORDS: Fourier terms; log-pol transformation

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