A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples

A micro-optical Fabry–Perot cavity fabricated by non-linear laser lithography on the endface of a standard telecom fiber is tested here as a microsensor for identifying oily liquids. The device operates within the 1550 nm spectral region, while the spectra recorded in reflection mode correlate to th...

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Main Authors: Vasileia Melissinaki, Maria Farsari, Stavros Pissadakis
Format: Article
Language:English
Published: MDPI AG 2017-01-01
Series:Fibers
Subjects:
Online Access:http://www.mdpi.com/2079-6439/5/1/1
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author Vasileia Melissinaki
Maria Farsari
Stavros Pissadakis
author_facet Vasileia Melissinaki
Maria Farsari
Stavros Pissadakis
author_sort Vasileia Melissinaki
collection DOAJ
description A micro-optical Fabry–Perot cavity fabricated by non-linear laser lithography on the endface of a standard telecom fiber is tested here as a microsensor for identifying oily liquids. The device operates within the 1550 nm spectral region, while the spectra recorded in reflection mode correlate to the refractive index of the oily liquids used, as well as, to the diffusion dynamics in the time domain of the oily samples inside the porous photo-polymerized sensing head. The operation of the microresonator sensing probe is explained by using a three-layer Fabry–Perot model and basic diffusion physics to estimate diffusivities for three series of refractive index matching oils with different chemical compositions that had been used in those experiments. The distinct spectro-temporal response of this sensing probe to the different oil samples is demonstrated and discussed.
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spelling doaj.art-64ae00f1da204f948701d70c58001e202022-12-22T04:19:41ZengMDPI AGFibers2079-64392017-01-0151110.3390/fib5010001fib5010001A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily SamplesVasileia Melissinaki0Maria Farsari1Stavros Pissadakis2Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), P.O. Box 1385, 71110 Heraklion, GreeceFoundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), P.O. Box 1385, 71110 Heraklion, GreeceFoundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), P.O. Box 1385, 71110 Heraklion, GreeceA micro-optical Fabry–Perot cavity fabricated by non-linear laser lithography on the endface of a standard telecom fiber is tested here as a microsensor for identifying oily liquids. The device operates within the 1550 nm spectral region, while the spectra recorded in reflection mode correlate to the refractive index of the oily liquids used, as well as, to the diffusion dynamics in the time domain of the oily samples inside the porous photo-polymerized sensing head. The operation of the microresonator sensing probe is explained by using a three-layer Fabry–Perot model and basic diffusion physics to estimate diffusivities for three series of refractive index matching oils with different chemical compositions that had been used in those experiments. The distinct spectro-temporal response of this sensing probe to the different oil samples is demonstrated and discussed.http://www.mdpi.com/2079-6439/5/1/1optical fiber sensorsFabry–Perot resonatorsporous surfacesoilsdiffusion in porous layersdirect laser writingmulti-photon polymerization
spellingShingle Vasileia Melissinaki
Maria Farsari
Stavros Pissadakis
A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
Fibers
optical fiber sensors
Fabry–Perot resonators
porous surfaces
oils
diffusion in porous layers
direct laser writing
multi-photon polymerization
title A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
title_full A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
title_fullStr A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
title_full_unstemmed A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
title_short A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
title_sort fiber optic fabry perot cavity sensor for the probing of oily samples
topic optical fiber sensors
Fabry–Perot resonators
porous surfaces
oils
diffusion in porous layers
direct laser writing
multi-photon polymerization
url http://www.mdpi.com/2079-6439/5/1/1
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