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Proceedings Paper

Optical fibre sensors based on multi-mode fibres and MIMO signal processing: an experimental approach
Author(s): Andreas Ahrens; Andre Sandmann; Kort Bremer; Bernhard Roth; Steffen Lochmann
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Paper 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.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96345W (28 September 2015); doi: 10.1117/12.2195114
Show Author Affiliations
Andreas Ahrens, Wismar Univ. (Germany)
Andre Sandmann, Wismar Univ. (Germany)
Kort Bremer, Leibniz Univ. Hannover (Germany)
Bernhard Roth, Leibniz Univ. Hannover (Germany)
Steffen Lochmann, Wismar Univ. (Germany)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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