New methods for modal decomposition in multi-mode fibres

S. Blin; T. N. Nguyen; D. M. Nguyen; P. Rochard; L. Provino; A. Monteville; T. Robin; A. Mugnier; B. Cadier; D. Pureur; M. Thual; T. Chartier

doi:10.1117/12.835436

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5 October 2009 New methods for modal decomposition in multi-mode fibres

S. Blin, T. N. Nguyen, D. M. Nguyen, P. Rochard, L. Provino, A. Monteville, T. Robin, A. Mugnier, B. Cadier, D. Pureur, M. Thual, T. Chartier

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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750346 (2009) https://doi.org/10.1117/12.835436
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

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S. Blin, T. N. Nguyen, D. M. Nguyen, P. Rochard, L. Provino, A. Monteville, T. Robin, A. Mugnier, B. Cadier, D. Pureur, M. Thual, and T. Chartier "New methods for modal decomposition in multi-mode fibres", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750346 (5 October 2009); https://doi.org/10.1117/12.835436

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