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Type: Journal article
Title: Modal interferometric refractive index sensing in microstructured exposed core fibres
Author: Maksymov, I.S.
Ebendorff-Heidepriem, H.
Greentree, A.D.
Citation: Optics Express, 2019; 27(25):36269-36275
Publisher: OSA Publishing
Issue Date: 2019
ISSN: 1094-4087
Statement of
Ivan S. Maksymov, Heike Ebendorff-Heidepriem, and Andrew D. Greentree
Abstract: Optical fibre-based sensors measuring refractive index shift in bodily fluids and tissues are versatile and accurate probes of physiological processes. Here, we suggest a refractive index sensor based on a microstructured exposed-core fibre (ECF). By considering a high refractive index coating of the exposed core, our modelling demonstrates the splitting of the guided mode into a surface sensing mode and a mode that is isolated from the surface. With the isolated mode acting as a reference arm, this two-mode one-fibre solution provides for robust interferometric sensing with a sensitivity of up to 60, 000 rad/RIU-cm, which is suitable for sensing subtle physiological processes within hard-to-reach places inside living organisms, such as the spinal cord, ovarian tract and blood vessels.
Rights: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI: 10.1364/OE.27.036269
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