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Article Dans Une Revue Proceedings of SPIE, the International Society for Optical Engineering Année : 2009

New methods for modal decomposition in multi-mode fibres

Résumé

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.
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hal-04378777 , version 1 (08-01-2024)

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S. Blin, T. Nguyen, D. Nguyen, P. Rochard, L. Provino, et al.. New methods for modal decomposition in multi-mode fibres. Proceedings of SPIE, the International Society for Optical Engineering, 2009, 7503, pp.750346. ⟨10.1117/12.835436⟩. ⟨hal-04378777⟩
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