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Carbon-coated fiber for optoelectronic strain and vibration sensing
University of the Basque Country, Spain.
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.ORCID iD: 0000-0002-8673-2880
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.ORCID iD: 0000-0002-0137-4245
University of the Basque Country, Spain.
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2024 (English)In: Optical fiber technology (Print), ISSN 1068-5200, E-ISSN 1095-9912, Vol. 85, article id 103794Article in journal (Refereed) Published
Abstract [en]

In this article, we report on a carbon-coated optical fiber that is suitable to be used simultaneously as a transmission medium and as a sensor. It consists of a standard single mode fiber (SMF) sleeved in two layers of coating, which provide protection and isolation from external elements. The inner layer is made of carbon, whereas the outer is made of polymer. When the fiber is subjected to mechanical stress, the electrical resistance of the carbon layer changes accordingly. The voltage variations caused by the former can be measured with high accuracy and without interfering with the light propagating through the SMF. In this work, the feasibility of this operating principle is demonstrated in a low coherence Michelson interferometer in which electrical and optical signals were measured simultaneously and compared to each other. Results indicate that electrical measurements are as precise as the optical ones and with linear behavior, reaching a sensitivity of 1.582 mV/με and able to detect vibrations down to 100 mHz. © 2024 The Authors

Place, publisher, year, edition, pages
Academic Press Inc. , 2024. Vol. 85, article id 103794
Keywords [en]
Coatings; Fiber optic sensors; Michelson interferometers; Single mode fibers; A-carbon; Carbon coated optical fibers; Carbon coating; Carbon-coated; Coated fibers; Impedance; Low coherence interferometers; Strain sensing; Vibration; Vibration sensing; Carbon
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-72793DOI: 10.1016/j.yofte.2024.103794Scopus ID: 2-s2.0-85189853431OAI: oai:DiVA.org:ri-72793DiVA, id: diva2:1857929
Note

This work was supported by the grants I\u202F+\u202FD\u202F+\u202Fi/PID2021-122505OBC31, TED2021-129959B-C21, PDC2022-133053-C21, RTC2019-007194-4 and PDC2022-133885-100 funded by MCIN / AEI/10 . 13039/501100011033 , by \u201C ERDF A way of making Europe\u201D, by the \u201C European Union Next Generation EU/PRTR \u201D. The research work is also supported by the Grant No. IT11452-22 and funded by the Basque Government , by ELKARTEK 2023 (\u03BC4Smart -KK-2023/00016 , MINAKU KK-2022/00080 and Ekohegaz II-KK-2023/00051 ) and by the University of the Basque Country (UPV/EHU)

Available from: 2024-05-15 Created: 2024-05-15 Last updated: 2024-05-15Bibliographically approved

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Pereira, JoaoFranciscangelis, CarolinaMargulis, Walter

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