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Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing

High-temperature-resistant fiber Bragg gratings (FBGs) are the main competitors to thermocouples as sensors in applications for high temperature environments defined as being in the 600–1200 °C temperature range. Due to their small size, capacity to be multiplexed into high density distributed senso...

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Detalles Bibliográficos
Autores principales: Grobnic, Dan, Hnatovsky, Cyril, Dedyulin, Sergey, Walker, Robert B., Ding, Huimin, Mihailov, Stephen J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7922305/
https://www.ncbi.nlm.nih.gov/pubmed/33669718
http://dx.doi.org/10.3390/s21041454
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author Grobnic, Dan
Hnatovsky, Cyril
Dedyulin, Sergey
Walker, Robert B.
Ding, Huimin
Mihailov, Stephen J.
author_facet Grobnic, Dan
Hnatovsky, Cyril
Dedyulin, Sergey
Walker, Robert B.
Ding, Huimin
Mihailov, Stephen J.
author_sort Grobnic, Dan
collection PubMed
description High-temperature-resistant fiber Bragg gratings (FBGs) are the main competitors to thermocouples as sensors in applications for high temperature environments defined as being in the 600–1200 °C temperature range. Due to their small size, capacity to be multiplexed into high density distributed sensor arrays and survivability in extreme ambient temperatures, they could provide the essential sensing support that is needed in high temperature processes. While capable of providing reliable sensing information in the short term, their long-term functionality is affected by the drift of the characteristic Bragg wavelength or resonance that is used to derive the temperature. A number of physical processes have been proposed as the cause of the high temperature wavelength drift but there is yet no credible description of this process. In this paper we review the literature related to the long-term wavelength drift of FBGs at high temperature and provide our recent results of more than 4000 h of high temperature testing in the 900–1000 °C range. We identify the major components of the high temperature wavelength drift and we propose mechanisms that could be causing them.
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spelling pubmed-79223052021-03-03 Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing Grobnic, Dan Hnatovsky, Cyril Dedyulin, Sergey Walker, Robert B. Ding, Huimin Mihailov, Stephen J. Sensors (Basel) Review High-temperature-resistant fiber Bragg gratings (FBGs) are the main competitors to thermocouples as sensors in applications for high temperature environments defined as being in the 600–1200 °C temperature range. Due to their small size, capacity to be multiplexed into high density distributed sensor arrays and survivability in extreme ambient temperatures, they could provide the essential sensing support that is needed in high temperature processes. While capable of providing reliable sensing information in the short term, their long-term functionality is affected by the drift of the characteristic Bragg wavelength or resonance that is used to derive the temperature. A number of physical processes have been proposed as the cause of the high temperature wavelength drift but there is yet no credible description of this process. In this paper we review the literature related to the long-term wavelength drift of FBGs at high temperature and provide our recent results of more than 4000 h of high temperature testing in the 900–1000 °C range. We identify the major components of the high temperature wavelength drift and we propose mechanisms that could be causing them. MDPI 2021-02-19 /pmc/articles/PMC7922305/ /pubmed/33669718 http://dx.doi.org/10.3390/s21041454 Text en © 2021 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 Review
Grobnic, Dan
Hnatovsky, Cyril
Dedyulin, Sergey
Walker, Robert B.
Ding, Huimin
Mihailov, Stephen J.
Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing
title Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing
title_full Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing
title_fullStr Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing
title_full_unstemmed Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing
title_short Fiber Bragg Grating Wavelength Drift in Long-Term High Temperature Annealing
title_sort fiber bragg grating wavelength drift in long-term high temperature annealing
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7922305/
https://www.ncbi.nlm.nih.gov/pubmed/33669718
http://dx.doi.org/10.3390/s21041454
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