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Home » Publications » Benchmarking the response of Bragg gratings written in microstructured and bow tie fiber embbedded in composites.

Benchmarking the response of Bragg gratings written in microstructured and bow tie fiber embbedded in composites.

Publication date 2009
B-Phot Authors Thomas Geernaert, Francis Berghmans, Hugo Thienpont
DOI http://dx.doi.org/10.1117/12.834831
Citation
G. Luyckx et al., “Benchmarking the response of Bragg gratings written in microstructured and bow tie fiber embbedded in composites.,” presented at the Proc. SPIE, 20th International Conference on Optical Fibre Sensors, 2009, vol. 7503, pp. 7503-1;7503-4.
Abstract Fiber Bragg gratings written in Bow-tie fiber and in highly birefringent micro-structured optical fiber are embedded in a carbon fiber reinforced epoxy. The Bragg peak wavelength shifts are measured under controlled bending, transversal load and thermal cycling of the composite sample. The results evidence the feasibility of using micro-structured fibers in structural integrity monitoring. We obtain similar axial as well as transversal strain sensitivities for the two embedded fiber types. We also highlight an important advantage of the micro-structured fibers for this application which is the low temperature dependence of the birefringence.
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