Experimental, analytical and finite-element-simulation approaches are presented for the characterization of fibre Bragg grating sensors written in conventional monomode and polarization-mantaining fibres subjected to transverse loading. Firstly, a diametrical-load configuration is considered. Numerical simulations show the behaviour to be nonlinear as a function of the applied load when an appropriate analytical model for the opto-mechanical response is employed. Secondly, experiments are carried out with the sensors embedded in epoxy specimens, when the latter are subjected to transversal biaxial loading. The response is monitored as a function of the vertical/horizontal load ratio. A finite-element model of the specimen with the embedded fibre and the previous analytical procedure are used to calculate the strain distributions in the fibre core resulting from loading, and predict the corresponding Bragg wavelength shifts. Experimental results are then compared to numerical predictions.

Characterization of embedded fiber Bragg grating sensors written in high-birefringent optical fibers subjected to transverse loading

BOSIA, Federico;
2002-01-01

Abstract

Experimental, analytical and finite-element-simulation approaches are presented for the characterization of fibre Bragg grating sensors written in conventional monomode and polarization-mantaining fibres subjected to transverse loading. Firstly, a diametrical-load configuration is considered. Numerical simulations show the behaviour to be nonlinear as a function of the applied load when an appropriate analytical model for the opto-mechanical response is employed. Secondly, experiments are carried out with the sensors embedded in epoxy specimens, when the latter are subjected to transversal biaxial loading. The response is monitored as a function of the vertical/horizontal load ratio. A finite-element model of the specimen with the embedded fibre and the previous analytical procedure are used to calculate the strain distributions in the fibre core resulting from loading, and predict the corresponding Bragg wavelength shifts. Experimental results are then compared to numerical predictions.
2002
Smart Structures and Materials 2002 Smart Sensor Technology and Measurement Systems
San Diego (USA)
18-19 March 2002
4694
175
186
Bosia, F.; Giaccari, P.; Facchini, M.; Botsis, J.; Limberger, H.; Salathé, R.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/108711
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