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Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing

New miniaturized sensors for biological and medical applications must be adapted to the measuring environments and they should provide a high measurement resolution to sense small changes. The Vernier effect is an effective way of magnifying the sensitivity of a device, allowing for higher resolutio...

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Autores principales: Gomes, André D., Becker, Martin, Dellith, Jan, Zibaii, Mohammad I., Latifi, Hamid, Rothhardt, Manfred, Bartelt, Hartmut, Frazão, Orlando
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6387336/
https://www.ncbi.nlm.nih.gov/pubmed/30678290
http://dx.doi.org/10.3390/s19030453
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author Gomes, André D.
Becker, Martin
Dellith, Jan
Zibaii, Mohammad I.
Latifi, Hamid
Rothhardt, Manfred
Bartelt, Hartmut
Frazão, Orlando
author_facet Gomes, André D.
Becker, Martin
Dellith, Jan
Zibaii, Mohammad I.
Latifi, Hamid
Rothhardt, Manfred
Bartelt, Hartmut
Frazão, Orlando
author_sort Gomes, André D.
collection PubMed
description New miniaturized sensors for biological and medical applications must be adapted to the measuring environments and they should provide a high measurement resolution to sense small changes. The Vernier effect is an effective way of magnifying the sensitivity of a device, allowing for higher resolution sensing. We applied this concept to the development of a small-size optical fiber Fabry–Perot interferometer probe that presents more than 60-fold higher sensitivity to temperature than the normal Fabry–Perot interferometer without the Vernier effect. This enables the sensor to reach higher temperature resolutions. The silica Fabry–Perot interferometer is created by focused ion beam milling of the end of a tapered multimode fiber. Multiple Fabry–Perot interferometers with shifted frequencies are generated in the cavity due to the presence of multiple modes. The reflection spectrum shows two main components in the Fast Fourier transform that give rise to the Vernier effect. The superposition of these components presents an enhancement of sensitivity to temperature. The same effect is also obtained by monitoring the reflection spectrum node without any filtering. A temperature sensitivity of −654 pm/°C was obtained between 30 °C and 120 °C, with an experimental resolution of 0.14 °C. Stability measurements are also reported.
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spelling pubmed-63873362019-02-26 Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing Gomes, André D. Becker, Martin Dellith, Jan Zibaii, Mohammad I. Latifi, Hamid Rothhardt, Manfred Bartelt, Hartmut Frazão, Orlando Sensors (Basel) Article New miniaturized sensors for biological and medical applications must be adapted to the measuring environments and they should provide a high measurement resolution to sense small changes. The Vernier effect is an effective way of magnifying the sensitivity of a device, allowing for higher resolution sensing. We applied this concept to the development of a small-size optical fiber Fabry–Perot interferometer probe that presents more than 60-fold higher sensitivity to temperature than the normal Fabry–Perot interferometer without the Vernier effect. This enables the sensor to reach higher temperature resolutions. The silica Fabry–Perot interferometer is created by focused ion beam milling of the end of a tapered multimode fiber. Multiple Fabry–Perot interferometers with shifted frequencies are generated in the cavity due to the presence of multiple modes. The reflection spectrum shows two main components in the Fast Fourier transform that give rise to the Vernier effect. The superposition of these components presents an enhancement of sensitivity to temperature. The same effect is also obtained by monitoring the reflection spectrum node without any filtering. A temperature sensitivity of −654 pm/°C was obtained between 30 °C and 120 °C, with an experimental resolution of 0.14 °C. Stability measurements are also reported. MDPI 2019-01-22 /pmc/articles/PMC6387336/ /pubmed/30678290 http://dx.doi.org/10.3390/s19030453 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gomes, André D.
Becker, Martin
Dellith, Jan
Zibaii, Mohammad I.
Latifi, Hamid
Rothhardt, Manfred
Bartelt, Hartmut
Frazão, Orlando
Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing
title Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing
title_full Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing
title_fullStr Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing
title_full_unstemmed Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing
title_short Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing
title_sort multimode fabry–perot interferometer probe based on vernier effect for enhanced temperature sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6387336/
https://www.ncbi.nlm.nih.gov/pubmed/30678290
http://dx.doi.org/10.3390/s19030453
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