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This work investigates the use of a Pd alloy as the hydrogen sensitive layer in an optical fibre surface plasmon resonance hydrogen sensor. The performance of the sensor is modelled using the transfer matrix model for a multi-layered structure. The structure consists of an Ag/SiO2/PdY stack deposited on the core of a multimode optical fibre. We detail the behaviour of the sensor in the spectral domain by investigating its sensitivity and detection accuracy. We find that careful choice of the Ag layer thickness is needed to optimise sensor performance

Optical Fibre Surface Plasmon Resonance Sensor Based on a Palladium-Yttrium Alloy