Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution

Surface plasmon resonance (SPR) sensors based on fiber optics have demonstrated strong potential in recent years for detecting refractive index (RI), temperature, and pressure. Among these, RI sensors have primarily focused on sensing aqueous solutions, particularly for biomedical applications. In c...

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Detalles Bibliográficos
Autores: Keshavarzi, Mohsen, Zandi, Mohammad Hossein, Sharif, Vahid, Pakarzadeh, Hassan
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2026
País:España
Institución:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:dnet:academicae__::65d35bc2813e079f7869d98062904ef8
Acceso en línea:https://hdl.handle.net/2454/56819
Access Level:acceso embargado
Palabra clave:Gas detection
Surface plasmon resonance (SPR)
SPR fiber sensors
Optical spectrum analyzer (OSA)
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spelling Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolutionKeshavarzi, MohsenZandi, Mohammad HosseinSharif, VahidPakarzadeh, HassanGas detectionSurface plasmon resonance (SPR)SPR fiber sensorsOptical spectrum analyzer (OSA)Surface plasmon resonance (SPR) sensors based on fiber optics have demonstrated strong potential in recent years for detecting refractive index (RI), temperature, and pressure. Among these, RI sensors have primarily focused on sensing aqueous solutions, particularly for biomedical applications. In contrast, gas sensing using similar configurations has received less attention, largely due to the challenge of accurately detecting the low RI range of gases. In this work, we report an SPR-based fiber sensor capable of detecting RI values in the range of 1.00 to 1.10, which encompasses nearly all gases. A practical and simple SPR sensor design is proposed using a ring-core fiber, where a thin gold layer is coated on the surface of the central air hole filled with the gas sample. Simulation results show a linear shift in spectral response with a wavelength sensitivity of 795 nm/RIU and a resolution on the order of 10-4RIU, enabling accurate discrimination of gas samples. Furthermore, the sensor exhibits a maximum amplitude sensitivity of approximately 401/RIU, indicating that a small change in the analyte RI (e.g., 0.01 RIU) results in a 40% variation in transmitted intensity, thus supporting cost-effective, intensity-based interrogation methods.Optica Publishing GroupIngeniería Eléctrica, Electrónica y de ComunicaciónIngeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio IngeniaritzaInstitute of Smart Cities - ISC2026info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2454/56819reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2026 Optica Publishing Group. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.info:eu-repo/semantics/embargoedAccessoai:dnet:academicae__::65d35bc2813e079f7869d98062904ef82026-06-17T12:41:47Z
dc.title.none.fl_str_mv Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
title Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
spellingShingle Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
Keshavarzi, Mohsen
Gas detection
Surface plasmon resonance (SPR)
SPR fiber sensors
Optical spectrum analyzer (OSA)
title_short Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
title_full Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
title_fullStr Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
title_full_unstemmed Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
title_sort Surface plasmon resonance-based ring-core fiber sensor for ultra-low refractive index (gas detection) with high resolution
dc.creator.none.fl_str_mv Keshavarzi, Mohsen
Zandi, Mohammad Hossein
Sharif, Vahid
Pakarzadeh, Hassan
author Keshavarzi, Mohsen
author_facet Keshavarzi, Mohsen
Zandi, Mohammad Hossein
Sharif, Vahid
Pakarzadeh, Hassan
author_role author
author2 Zandi, Mohammad Hossein
Sharif, Vahid
Pakarzadeh, Hassan
author2_role author
author
author
dc.contributor.none.fl_str_mv Ingeniería Eléctrica, Electrónica y de Comunicación
Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza
Institute of Smart Cities - ISC
dc.subject.none.fl_str_mv Gas detection
Surface plasmon resonance (SPR)
SPR fiber sensors
Optical spectrum analyzer (OSA)
topic Gas detection
Surface plasmon resonance (SPR)
SPR fiber sensors
Optical spectrum analyzer (OSA)
description Surface plasmon resonance (SPR) sensors based on fiber optics have demonstrated strong potential in recent years for detecting refractive index (RI), temperature, and pressure. Among these, RI sensors have primarily focused on sensing aqueous solutions, particularly for biomedical applications. In contrast, gas sensing using similar configurations has received less attention, largely due to the challenge of accurately detecting the low RI range of gases. In this work, we report an SPR-based fiber sensor capable of detecting RI values in the range of 1.00 to 1.10, which encompasses nearly all gases. A practical and simple SPR sensor design is proposed using a ring-core fiber, where a thin gold layer is coated on the surface of the central air hole filled with the gas sample. Simulation results show a linear shift in spectral response with a wavelength sensitivity of 795 nm/RIU and a resolution on the order of 10-4RIU, enabling accurate discrimination of gas samples. Furthermore, the sensor exhibits a maximum amplitude sensitivity of approximately 401/RIU, indicating that a small change in the analyte RI (e.g., 0.01 RIU) results in a 40% variation in transmitted intensity, thus supporting cost-effective, intensity-based interrogation methods.
publishDate 2026
dc.date.none.fl_str_mv 2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/56819
url https://hdl.handle.net/2454/56819
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Optica Publishing Group
publisher.none.fl_str_mv Optica Publishing Group
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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