DIFFRACTIVE OPTICS, OPTICAL TECHNOLOGIES

Propagation of optical vortices in an add-drop resonator based on a vertical array of ring resonators

B. P. Lapin, E. V. Barshak, M. A. Yavorsky, C. N. Alexeyev

V. I. Vernadsky Crimean Federal University, Simferopol

Abstract: In this paper we study the transmission of higher-order modes, including optical vortices (OVs), through a bus fiber evanescently coupled with a vertical array of ring resonators (VAR), which form a vertically stacked multi-ring resonator. It is shown that the OV transmission curves have a characteristic structure that we explain by the manifestation of the band structure of an infinite stack of coupled ring resonators. We demonstrate a fundamental possibility of using VARs as elements of delay lines for fiber-optic communications using orbital angular momentum. It is shown that the VAR is capable of serving as a delay line element for even and odd Laguerre-Gauss modes.

Keywords: optical fiber, torsional mechanical stresses, dispersion, optical vortex

Received: 19.05.2023
Accepted: 06.07.2023

DOI: 10.18287/2412-6179-CO-1392