Superposition of fiber Bragg and LPG gratings for embedded strain measurement

Publication date: Available online 11 August 2016 Source:Comptes Rendus Physique Author(s): Romain Guyard, Dominique Leduc, Yann Lecieux, Cyril Lupi When a fiber Bragg grating strain sensor is embedded inside a structure, the interaction of the sensor with the host material can lead to spurious results if the radial strain is neglected. In this article, we use numerical simulations to show that the axial and radial strains can be simultaneously measured with a single fiber in which a Bragg grating and a long-period grating are superimposed. Moreover, we present an optimal architecture of the sensor.

Source: Comptes Rendus Physique - August 11, 2016 Category: Physics Source Type: research