Corrugated long-period grating for strain, displacement, and temperature sensor applications

Résumé fourni par la source

In this work, we present a novel corrugated long-period grating. The structure was made through the periodic distribution of a photopolymerizable resin onto the surface of an optical fiber, followed by an etching process. The device showed capabilities to be used in strain, displacement, and temperature applications. For the strain measurement, the resonance dip power was linearly increased at a rate of 1.3 dB/mε, showing negligible wavelength shift, making it ideal for lowcost intensity detection schemes. Regarding the displacement characterization, it was verified the capability to measure this parameter in both power and wavelength detection schemes, being the most attractive feature its wide measurement range, i.e. ≈ 25 mm, being above the ones reported in literature. For the temperature, it was verified that there is a direct correlation between the increase of the temperature and the dip wavelength shift.

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