期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 144, 期 1, 页码 226-231出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.10.062
关键词
Fibre-optics sensors; Fibre Bragg gratings; Surface plasmon resonance
资金
- Spanish Government [CTM2004-03899]
- Comunidad de Madrid [S-0505/AMB-0374]
- Proyecto de Investigacion Santander/Complutense [PR34/07-15886]
- Portuguese Government - Fundacao para a Ciencia e Tecnologia (FCT) [SFRH/BD/30086/2006]
- Becas Internacionales Universidad Complutense/Empresa Flores Valles 2008
- Fundação para a Ciência e a Tecnologia [SFRH/BD/30086/2006] Funding Source: FCT
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. (C) 2009 Elsevier B.V. All rights reserved.
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