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

Andreas Ahrens | Zendy; André Sandmann | Zendy; Kort Bremer | Zendy; Bernhard Roth | Zendy; Steffen Lochmann | Zendy

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

Author(s) -

Andreas Ahrens,

André Sandmann,

Kort Bremer,

Bernhard Roth,

Steffen Lochmann

Publication year - 2015

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.2195114

Subject(s) - mimo , crosstalk , electronic engineering , optical fiber , signal processing , signal (programming language) , transmission (telecommunications) , computer science , materials science , engineering , telecommunications , digital signal processing , programming language , beamforming

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

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