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. 2021 Sep 10;21(18):6072. doi: 10.3390/s21186072

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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) The loaded and unloaded pressure steps of FBG1 sensor after compensating for temperature. (b) FBG1 wavelength shift against loaded and unloaded pressure.