Optical fibre sensors based on multi-mode fibres and MIMO signal processing: an experimental approach

Andreas Ahrens; Andre Sandmann; Kort Bremer; Bernhard Roth; Steffen Lochmann

doi:10.1117/12.2195114

28 September 2015 Optical fibre sensors based on multi-mode fibres and MIMO signal processing: an experimental approach

Andreas Ahrens, Andre Sandmann, Kort Bremer, Bernhard Roth, Steffen Lochmann

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96345W (2015) https://doi.org/10.1117/12.2195114
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

In this paper multiple-input multiple-output (MIMO) signal processing is investigated for fibre optic sensor applications. A (2 × 2) MIMO implementation is realized by using lower-order and higher-order mode groups of a graded-index (GI) multi-mode fibre (MMF) as separate transmission channels. A micro-bending pressure sensor changes these separate transmission characteristics and introduces additional crosstalk. By observing the weight-factors of the MIMO system the amount of load applied was determined. Experiments verified a good correlation between the change of the MIMO weight coefficients and the load applied to the sensor and thus verified that MIMO signal processing can beneficially be used for fibre optic sensor applications.

Citation Download Citation

Andreas Ahrens, Andre Sandmann, Kort Bremer, Bernhard Roth, and Steffen Lochmann "Optical fibre sensors based on multi-mode fibres and MIMO signal processing: an experimental approach", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96345W (28 September 2015); https://doi.org/10.1117/12.2195114

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