Propagation of space-time optical vortices in multimode fibers
Abstract
The non-intuitive spatiotemporal modal content of space-time optical vortices (STOVs) is calculated in a graded-index fiber supporting a large number of propagating modes. We discuss how a fiber supporting many modes allows to truly couple higher-order STOVs, the number of modes necessary to support a STOV of a certain order, and conversely the truncation effect in a few-mode fiber. Based on the excited modes and their temporal profiles, we show numerical results for the linear and nonlinear propagation of STOVs in multimode fibers, specifically the linear space-time beating at short propagation distances, and the nonlinear trapping effect between modes producing stable states on long propagation distances. Our results underline how STOVs present a rich platform for multimode nonlinear optics and technology.
Keywords
Cite
@article{arxiv.2504.01643,
title = {Propagation of space-time optical vortices in multimode fibers},
author = {Spencer W. Jolly and Julien Dechanxhe and Pascal Kockaert},
journal= {arXiv preprint arXiv:2504.01643},
year = {2025}
}
Comments
9 pages, 6 figures, submitted for peer review