New methods for modal decomposition in multi-mode fibres
Abstract
We propose and demonstrate two methods for modal decomposition in multi-mode fibres. Linearly polarized modes propagating in a slightly multi-mode fibre are easily retrieved from intensity measurements at the fibre output surface. The first method is an improvement of the so-called spectrally and spatially imaging technique, which is limited to largemode-area optical fibers. The second method is a new, simpler and faster solution for the characterization of any kind of optical fibre, thus attractive in comparison to previously reported methods, which are cumbersome, time-consuming and/or limited to large-more-area fibres. Different kinds of multi-mode optical fibres are characterized. A large-modearea photonic-bandgap fibre, a photonic-crystal small-core non-linear fibre, and a standard index-stepped multi-mode fibre are characterized successfully.
Cite
@article{arxiv.2401.04438,
title = {New methods for modal decomposition in multi-mode fibres},
author = {S. Blin and T. Nguyen and D. Nguyen and P. Rochard and L. Provino and A. Monteville and T. Robin and A. Mugnier and B. Cadier and D. Pureur and Monique Thual and T. Chartier},
journal= {arXiv preprint arXiv:2401.04438},
year = {2024}
}