Mode transitions and thickness measurements during deposition of nanoscale TiO2 coatings on tilted fiber Bragg gratings
| dc.contributor.author | Imas González, José Javier | |
| dc.contributor.author | Albert, Jacques | |
| dc.contributor.author | Del Villar, Ignacio | |
| dc.contributor.author | Ozcariz Celaya, Aritz | |
| dc.contributor.author | Ruiz Zamarreño, Carlos | |
| dc.contributor.author | Matías Maestro, Ignacio | |
| dc.contributor.department | Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren | eu |
| dc.contributor.department | Institute of Smart Cities - ISC | en |
| dc.contributor.department | Ingeniería Eléctrica, Electrónica y de Comunicación | es_ES |
| dc.date.accessioned | 2023-01-11T08:26:42Z | |
| dc.date.available | 2023-06-27T23:00:10Z | |
| dc.date.issued | 2022 | |
| dc.date.updated | 2023-01-11T08:02:35Z | |
| dc.description.abstract | The mode transition is a phenomenon observed in thin film coated long period fiber gratings (LPGs) and singlemode multimode single-mode (SMS) fibers for certain values of the coating thickness and refractive index, resulting in increased sensitivity for sensing applications. It is shown here that mode transitions occur simultaneously for a large number of mode resonances in the transmission spectra of tilted fiber Bragg gratings (TFBG) measured during the deposition of ~350nm thick TiO2 coatings by Atomic Layer Deposition (ALD). In TFBGs, the mode transition shows up as an acceleration of the resonance wavelength shift vs thickness, but without fading of the resonance amplitude. Furthermore, the results show that the mode transition for cladding modes with predominantly “TE” polarization at the cladding boundary is significantly sharper than that of predominantly “TM” polarized modes and that it occurs at a smaller coating thickness (<100 nm vs >200 nm). Finally, using a separately determined coating refractive index (2.14, by ellipsometry on witness flats deposited simultaneously) and simulations of the resonance shifts of the TFBG with coating thickness, it is demonstrated that a TFBG connected to a spectral interrogation system can be used to measure the growth of a coating on the surface of the fiber in real time. | es_ES |
| dc.description.sponsorship | This work was supported in part by the Spanish Ministry, Formación de Profesorado Universitario under Grant FPU18/03087, in part by the Spanish Ministry of Science and Innovation through TEC Research fund under Grant PID2019-106231RB-I00, and in part by NSERC under Grant RGPIN-2019- 06255. | en |
| dc.embargo.lift | 2023-06-27 | |
| dc.embargo.terms | 2023-06-27 | |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | J. J. Imas, J. Albert, I. D. Villar, A. Ozcáriz, C. R. Zamarreño and I. R. Matías, "Mode Transitions and Thickness Measurements During Deposition of Nanoscale TiO2 Coatings on Tilted Fiber Bragg Gratings," in Journal of Lightwave Technology, vol. 40, no. 17, pp. 6006-6012, 1 Sept.1, 2022, doi: 10.1109/JLT.2022.3186596 | en |
| dc.identifier.doi | 10.1109/JLT.2022.3186596 | |
| dc.identifier.issn | 0733-8724 | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/44575 | |
| dc.language.iso | eng | en |
| dc.publisher | IEEE | en |
| dc.relation.ispartof | Journal of Lightwave Technology vol. 40, no. 17, September 1, 2022 | en |
| dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-106231RB-I00/ES/ | |
| dc.relation.publisherversion | https://doi.org/10.1109/JLT.2022.3186596 | |
| dc.rights | © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work. | en |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.subject | Fiber optic sensors | en |
| dc.subject | Mode transition | en |
| dc.subject | Thin films | en |
| dc.subject | Tilted fiber Bragg gratings | en |
| dc.title | Mode transitions and thickness measurements during deposition of nanoscale TiO2 coatings on tilted fiber Bragg gratings | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/acceptedVersion | |
| dspace.entity.type | Publication | |
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