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

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

Blog Article

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 Science and Religion Shift in the First Three Months of the Covid-19 Pandemic 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 A Data-Centric Internet of Things Framework Based on Azure Cloud 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.