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Sensors 2011, 11(3), 2566-2579; doi:10.3390/s110302566
Article

Microstructured Optical Fiber Sensors Embedded in a Laminate Composite for Smart Material Applications

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1 Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium 2 CRISMAT CNRT-Matériaux/ENSICAEN, UMR 6508, UMS 3318, 6, Boulevard du Maréchal Juin, 14050 Caen Cedex 04, France 3 Universiteit Gent, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium 4 Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland 5 Marie Curie-Sklodowska University, Pl. M. Curie-Sklodowskiej 3, 20-031 Lublin, Poland 6 Institute of Photonic Technology, Albert-Einstein-Straße 9, D-07745 Jena, Germany
* Author to whom correspondence should be addressed.
Received: 24 November 2010 / Revised: 3 February 2011 / Accepted: 12 February 2011 / Published: 28 February 2011
(This article belongs to the Special Issue Advanced Embedded Sensors)
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Abstract

Fiber Bragg gratings written in highly birefringent microstructured optical fiber with a dedicated design are embedded in a composite fiber-reinforced polymer. The Bragg peak wavelength shifts are measured under controlled axial and transversal strain and during thermal cycling of the composite sample. We obtain a sensitivity to transversal strain that exceeds values reported earlier in literature by one order of magnitude. Our results evidence the relevance of using microstructured optical fibers for structural integrity monitoring of composite material structures.
Keywords: Fiber Bragg grating; carbon fiber reinforced polymer; strain field monitoring Fiber Bragg grating; carbon fiber reinforced polymer; strain field monitoring
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Sonnenfeld, C.; Sulejmani, S.; Geernaert, T.; Eve, S.; Lammens, N.; Luyckx, G.; Voet, E.; Degrieck, J.; Urbanczyk, W.; Mergo, P.; Becker, M.; Bartelt, H.; Berghmans, F.; Thienpont, H. Microstructured Optical Fiber Sensors Embedded in a Laminate Composite for Smart Material Applications. Sensors 2011, 11, 2566-2579.

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