Cargando…

Numerical Analysis of Radiation Effects on Fiber Optic Sensors

Optical fiber sensors (OFS) are a potential candidate for monitoring physical parameters in nuclear environments. However, under an irradiation field the optical response of the OFS is modified via three primary mechanisms: (i) radiation-induced attenuation (RIA), (ii) radiation-induced emission (RI...

Descripción completa

Detalles Bibliográficos
Autores principales: Rana, Sohel, Subbaraman, Harish, Fleming, Austin, Kandadai, Nirmala
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232191/
https://www.ncbi.nlm.nih.gov/pubmed/34203744
http://dx.doi.org/10.3390/s21124111
_version_ 1783713583714009088
author Rana, Sohel
Subbaraman, Harish
Fleming, Austin
Kandadai, Nirmala
author_facet Rana, Sohel
Subbaraman, Harish
Fleming, Austin
Kandadai, Nirmala
author_sort Rana, Sohel
collection PubMed
description Optical fiber sensors (OFS) are a potential candidate for monitoring physical parameters in nuclear environments. However, under an irradiation field the optical response of the OFS is modified via three primary mechanisms: (i) radiation-induced attenuation (RIA), (ii) radiation-induced emission (RIE), and (iii) radiation-induced compaction (RIC). For resonance-based sensors, RIC plays a significant role in modifying their performance characteristics. In this paper, we numerically investigate independently the effects of RIC and RIA on three types of OFS widely considered for radiation environments: fiber Bragg grating (FBG), long-period grating (LPG), and Fabry-Perot (F-P) sensors. In our RIC modeling, experimentally calculated refractive index (RI) changes due to low-dose radiation are extrapolated using a power law to calculate density changes at high doses. The changes in RI and length are subsequently calculated using the Lorentz–Lorenz relation and an established empirical equation, respectively. The effects of both the change in the RI and length contraction on OFS are modeled for both low and high doses using FIMMWAVE, a commercially available vectorial mode solver. An in-depth understanding of how radiation affects OFS may reveal various potential OFS applications in several types of radiation environments, such as nuclear reactors or in space.
format Online
Article
Text
id pubmed-8232191
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-82321912021-06-26 Numerical Analysis of Radiation Effects on Fiber Optic Sensors Rana, Sohel Subbaraman, Harish Fleming, Austin Kandadai, Nirmala Sensors (Basel) Article Optical fiber sensors (OFS) are a potential candidate for monitoring physical parameters in nuclear environments. However, under an irradiation field the optical response of the OFS is modified via three primary mechanisms: (i) radiation-induced attenuation (RIA), (ii) radiation-induced emission (RIE), and (iii) radiation-induced compaction (RIC). For resonance-based sensors, RIC plays a significant role in modifying their performance characteristics. In this paper, we numerically investigate independently the effects of RIC and RIA on three types of OFS widely considered for radiation environments: fiber Bragg grating (FBG), long-period grating (LPG), and Fabry-Perot (F-P) sensors. In our RIC modeling, experimentally calculated refractive index (RI) changes due to low-dose radiation are extrapolated using a power law to calculate density changes at high doses. The changes in RI and length are subsequently calculated using the Lorentz–Lorenz relation and an established empirical equation, respectively. The effects of both the change in the RI and length contraction on OFS are modeled for both low and high doses using FIMMWAVE, a commercially available vectorial mode solver. An in-depth understanding of how radiation affects OFS may reveal various potential OFS applications in several types of radiation environments, such as nuclear reactors or in space. MDPI 2021-06-15 /pmc/articles/PMC8232191/ /pubmed/34203744 http://dx.doi.org/10.3390/s21124111 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rana, Sohel
Subbaraman, Harish
Fleming, Austin
Kandadai, Nirmala
Numerical Analysis of Radiation Effects on Fiber Optic Sensors
title Numerical Analysis of Radiation Effects on Fiber Optic Sensors
title_full Numerical Analysis of Radiation Effects on Fiber Optic Sensors
title_fullStr Numerical Analysis of Radiation Effects on Fiber Optic Sensors
title_full_unstemmed Numerical Analysis of Radiation Effects on Fiber Optic Sensors
title_short Numerical Analysis of Radiation Effects on Fiber Optic Sensors
title_sort numerical analysis of radiation effects on fiber optic sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232191/
https://www.ncbi.nlm.nih.gov/pubmed/34203744
http://dx.doi.org/10.3390/s21124111
work_keys_str_mv AT ranasohel numericalanalysisofradiationeffectsonfiberopticsensors
AT subbaramanharish numericalanalysisofradiationeffectsonfiberopticsensors
AT flemingaustin numericalanalysisofradiationeffectsonfiberopticsensors
AT kandadainirmala numericalanalysisofradiationeffectsonfiberopticsensors