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oai:docta.ucm.es:20.500.14352/441142023-08-27T19:30:24Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Díaz Herrera, Natalia author Viegas, Diana Catarino das Neves author Jorge, Pedro A. S. author Araújo, Francisco Manuel Moita author Santos, Jose Luis author Navarrete Fernández, María Cruz author González Cano, Agustín author 2010-01-29 In this work a new configuration of a refractometric sensor for aqueous solutions based on the combination of surface plasmon resonance (SPR) with fibre Bragg gratings (FBG) is presented. Two FBGs are selected having reflection maxima in each side of the plasmon resonance peak. These FBGs enable a different processing scheme for the information provided by the SPR transducer. This improved interrogation method increases the sensitivity and resolution of the sensor compared with those obtained with the usual method of tracking the spectral transmittance minimum and makes the system performance independent of optical source power fluctuations. The experimental results obtained with a double-layer uniform-waist tapered fibre show the feasibility of this approach and its applicability in SPR-based biosensors that must face very exigent measuring conditions. 0925-4005 10.1016/j.snb.2009.10.062 https://hdl.handle.net/20.500.14352/44114 http://dx.doi.org/10.1016/j.snb.2009.10.062 http://www.sciencedirect.com/ Fibre-optic SPR sensor with a FBG interrogation scheme for readout enhancement