In this work, a numerical study and experimental validation of an optical fiber sensor based on Surface Plasmon Resonance (SPR) for H 2 detection are presented. This sensor is composed of a multi-mode fiber with a SPR structure of a metal/dielectric/Pd, where the Pd acts as a. Since H 2 has physicochemical properties of being highly permeable and combustible, high-performance H 2 sensors to detect and monitor hydrogen concentration are essential. In this approach, a transducer layer is deposited on the outside of a multimode fiber, after removing the optical cladding. However, due to H 2 's flammability it is crucial to monitor its concentrations in the environment. Optical sensors have been developed to monitor H 2 concentrations. We present a novel fiber optic hydrogen sensor with fast response fabricated from a graphene–Au–Pd sandwich nanofilm and an ultrashort fiber Bragg grating.
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