Regenerated Fiber Bragg Gratings in Multicore Fiber for Multi-Parameter Sensing

Multiple regenerated fiber Bragg gratings were inscribed in all the cores of a seven-core fiber in order to develop a multi-parameter sensor designed to operate at high temperatures. We experimentally showed the possibility of measuring strains of up to 1200 μϵ, curvatures from 0° to 360° and temperatures up to 1000 °C, with a maximum curvature magnitude of at least 4.6 m−1 and a maximum sensibility of 96 pm/m−1.

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