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

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

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Original version

Ahrens, A.; Sandmann, A.; Bremer, K.; Roth, B.; Lochmann, S.: Optical fibre sensors based on multi-mode fibres and MIMO signal processing: An experimental approach. In: Proceedings of SPIE - The International Society for Optical Engineering 9634 (2015), 96345W. DOI: https://doi.org/10.1117/12.2195114

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/1775

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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. © 2015 SPIE.
License of this version:	Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Publication type:	Article
Publishing status:	publishedVersion
Publication date:	2015
Keywords english:	Multiple-input multiple-output system, Optical fibre sensors, Singular-value decomposition, Codes (symbols), Feedback control, Fiber optic sensors, Fibers, MIMO systems, Optical fibers, Singular value decomposition, Telecommunication repeaters, Experimental approaches, Good correlations, Higher-order modes, Mimo implementations, Multiple input multiple output system, Transmission channels, Transmission characteristics, Weight coefficients, Signal processing
DDC:	530 \| Physik
Controlled keywords(GND):	Konferenzschrift