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Reflection-based fibre-optic refractive index sensor using surface plasmon resonance
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SYSNO ASEP 0431674 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reflection-based fibre-optic refractive index sensor using surface plasmon resonance Author(s) Hlubina, P. (CZ)
Kadulová, M. (CZ)
Ciprian, D. (CZ)
Sobota, Jaroslav (UPT-D) RID, ORCID, SAINumber of authors 4 Source Title Journal of the European Optical Society: Rapid publications. - : European optical society
Roč. 9, August 19 (2014), 14033:1-5Number of pages 5 s. Publication form Print - P Language eng - English Country FI - Finland Keywords surface plasmon resonance ; fibre-optic sensor ; spectral interrogation technique ; aqueous solutions of ethanol ; refractive index Subject RIV BH - Optics, Masers, Lasers R&D Projects LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) UT WOS 000343897300002 EID SCOPUS 84907358209 DOI 10.2971/jeos.2014.14033 Annotation A reflection-based fibre-optic refractive index sensor using surface plasmon resonance (SPR) in a thin metal film sputtered on a bare core of a multimode optical fibre is presented. The sensing element of the SPR fibre-optic sensor is the core of a step-index optical fibre made of fused silica with a gold film double-sided sputtered on the whole core surface, including the core end face. Consequently, a terminated reflection-based sensing scheme to measure the refractive indices of liquids is realized. The sensing scheme uses a wavelength interrogation method and the refractive index of a liquid is sensed by measuring the position of the dip in the reflected spectral intensity distribution. As an example, the aqueous solutions of ethanol with refractive indices in a range from 1.333 to 1.363 are measured. In addition, the increase in the sensitivity of the SPR fibre-optic refractive index sensor with the decrease of the fibre sensing length is demonstrated. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2015
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