Optical fibre-based refractive index measurement sensor
by Jayprabha Vishal Terdale; Amrit Ghosh
International Journal of Engineering Systems Modelling and Simulation (IJESMS), Vol. 14, No. 2, 2023

Abstract: Optical devices are increasingly widely used in surveillance, particularly in the food, beverage, and healthcare sectors. A precise refractive index profile is required to support maximum light intensity on the fibre material. But unpolished optical fibre has a difficult RI profile. By changing the solution's concentration, it allows precise RI measurement. We present an intensity modulated fibre optic refractive index measurement using macro-bending and side polishing. RI conditions and the dipping solution concentration in the detecting region are more sensitive to probes with a polished surface (sucrose, glycerin, and ethanol). With RI 1.34-1.42, the POF performance sensing capability increases. This allows for physical variations in intensity at visible wavelengths at cheap cost and compact size.

Online publication date: Tue, 04-Apr-2023

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