New methods for modal decomposition in multi-mode fibres

Proceedings of SPIE, the International Society for Optical Engineering, 2009, 7503, pp.750346 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 t...

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Main Authors Blin, S, Nguyen, T, Nguyen, D, Rochard, P, Provino, L, Monteville, A, Robin, T, Mugnier, A, Cadier, B, Pureur, D, Thual, Monique, Chartier, T
Format Journal Article
LanguageEnglish
Published 09.01.2024
Subjects
Physics - Optics
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Summary:Proceedings of SPIE, the International Society for Optical Engineering, 2009, 7503, pp.750346 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.
DOI:10.48550/arxiv.2401.04438