Title: Optical fibre-based refractive index measurement sensor

Authors: Jayprabha Vishal Terdale; Amrit Ghosh

Addresses: Sir Padampat Singhania University, Bhatewar, Rajasthan 313601, India ' Sir Padampat Singhania University, Bhatewar, Rajasthan 313601, India

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.

Keywords: intensity modulation; macro-bending; transparent liquid; sucrose; glycerine; ethanol; U-shape polished optical fibre; refractive index sensor.

DOI: 10.1504/IJESMS.2023.129990

International Journal of Engineering Systems Modelling and Simulation, 2023 Vol.14 No.2, pp.101 - 108

Received: 13 Sep 2021
Accepted: 17 Nov 2021
Published online: 04 Apr 2023 *

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