Reflection-based fibre-optic refractive index sensor using surface plasmon resonance

0431674 - ÚPT 2015 RIV FI eng J - Článek v odborném periodiku
Hlubina, P. - Kadulová, M. - Ciprian, D. - Sobota, Jaroslav
Reflection-based fibre-optic refractive index sensor using surface plasmon resonance.
Journal of the European Optical Society: Rapid publications. Roč. 9, August 19 (2014), 14033:1-5. E-ISSN 1990-2573
Grant CEP: GA MŠMT(CZ) LO1212
Klíčová slova: surface plasmon resonance * fibre-optic sensor * spectral interrogation technique * aqueous solutions of ethanol * refractive index
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 1.231, rok: 2014

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.
Trvalý link: http://hdl.handle.net/11104/0236267