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. 2021 Sep 28;21(19):6469. doi: 10.3390/s21196469

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© 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 (https://creativecommons.org/licenses/by/4.0/).

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(a) Articles as a function of publication year retrieved by searching for optical-fibre sensors. Some representative types of optical-fibre sensors for biomedical applications are depicted. The data were taken from 1351 articles found in Web of Science Core Collection when searching for optical-fibre sensors (23,895 records) and restricting the results applicable to the biomedical field (accessed on 17 September 2021). (b) Map visualization of keywords links strength network using the same 1351 articles information. Only keywords exceeding twenty occurrences are depicted. The period selected is from 1965 to 2021. Abbreviations: magnetic resonance imaging: mri; surface plasmon resonance: spr; fibre Bragg grating: fbg; optical coherence tomography: oct; photonic crystal fibre: pcf. Graph created using VOSviewer software version 1.6.17 [13]. The evolution of published articles over the years and network maps of keywords related to optical-fibre sensors in general (not restricted to the biomedical field) can be found in the supporting information (Figures S1 and S2), including details on how these graphs were generated.