Work

Transmission optimization and mode crosstalk suppression in optical-system-modulated perfect vortex beams

Year: 2026

Type: article

Abstract: This study investigates transmitter-side beam modulation of perfect vortex (PV) and focused perfect vortex (FPV) beams using a conventional two-lens beam-expanding collimation system. Three transmission scenarios of perfect vortex (PV) beams and focused perfect vortex (FPV) beams are investigated in free space and atmospheric turbulence. The results show that the system regulates the non-diffractive and focusing propagation regions of PV/FPV beams and improves the target OAM mode received probability under the adopted non-Kolmogorov weak-fluctuation model. The received probability is governed by the initial beam parameters, system magnification, FPV focal parameter, and receiver aperture radius. To optimize these coupled parameters, a Latin hypercube sampling (LHS)-assisted particle swarm optimization (PSO) combined with pattern search is used. The optimized FPV beam modulated by the beam-expanding collimation system maintains a higher received probability than direct FPV propagation at representative distances, providing theoretical guidance for transmitter-side beam and system parameter selection.

Source: Optics Express

DOI: 10.1364/oe.600251

Authors: Yan Qin, Jinxin Deng

Institution: The Engineering & Technical College of Chengdu University of Technology

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Xihua University