Work

Spiral sampling algorithm for calculating the complex orbital angular momentum spectrum

Year: 2025

Type: article

Abstract: The orbital angular momentum (OAM) spectrum is a critical parameter for OAM-based applications, as it reflects the OAM components of the measured light field. However, traditional definition-based algorithms for determining the OAM spectrum are time-consuming and dependent on extensive prior knowledge. To solve it, we propose what we believe to be a novel method for calculating the complex OAM spectrum. Our approach utilizes spiral sampling and Fourier transform, followed by appropriate filtering and inverse Fourier transform to retrieve the radial coefficients of arbitrary OAM components. Both simulation and experimental results validate the effectiveness of our method. This algorithm provides a powerful tool for future OAM-based applications.

Source: Optics Express

DOI: 10.1364/oe.566904

Authors: Zheng Han, Bowen Yang, Xiao Chen, Jiaqi Zheng, Bin Zou, Yiquan Wang

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

Funders: Minzu University of China, National Key Research and Development Program of China

Awards: G1885947686, G4160961395