Fibre-optic SPR sensor with a FBG interrogation scheme for readout enhancement

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Natalia Diaz Herrera (Author) Other; Diana Viegas (Author) Other; Pedro A S Jorge (Author) FCUP; Francisco M Araujo (Author) Other; Jose Luis Santos (Author) FCUP; Maria Cruz Navarrete (Author) Other; Agustin Gonzalez Cano (Author) Other

Journal

Title: Sensors and Actuators, B: Chemical

Vol. 144 No. 1

Pages: 226-231

ISSN: 0925-4005

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 17 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-003-9NP

DOI: 10.1016/j.snb.2009.10.062

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific