{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,24]],"date-time":"2026-01-24T15:41:38Z","timestamp":1769269298102,"version":"3.49.0"},"reference-count":30,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2020,9,24]],"date-time":"2020-09-24T00:00:00Z","timestamp":1600905600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100008530","name":"European Regional Development Fund","doi-asserted-by":"publisher","award":["10164756"],"award-info":[{"award-number":["10164756"]}],"id":[{"id":"10.13039\/501100008530","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Polymer\u2013matrix composites degrade under the influence of UV radiation in the range of the 290\u2013400 nm band. The degradation of polymer\u2013matrix composites exposed to UV radiation is characterized by extensive aging of the epoxy matrix, resulting in deterioration of their mechanical properties. Glass fibers\/epoxy resin composites were made by an out-of-autoclave method whereas a fiber optic sensor was placed between different layers of laminates. In our work, we used a fiber Bragg grating sensor covered with graphene oxide and embedded in a polymer matrix composite to monitor UV radiation intensity. Measurements of UV radiation may allow monitoring the aging process of individual components of the polymer composite. In order to estimate the number of microcracks of epoxy resin, microstructure observations were carried out using a scanning electron microscope.<\/jats:p>","DOI":"10.3390\/s20195468","type":"journal-article","created":{"date-parts":[[2020,9,24]],"date-time":"2020-09-24T08:33:03Z","timestamp":1600936383000},"page":"5468","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4692-4968","authenticated-orcid":false,"given":"Piotr","family":"Lesiak","sequence":"first","affiliation":[{"name":"Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4286-8540","authenticated-orcid":false,"given":"Karolina","family":"Bednarska","sequence":"additional","affiliation":[{"name":"Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland"},{"name":"Centre for Advanced Materials and Technologies CEZAMAT, 02-822 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Krzysztof","family":"Ma\u0142kowski","sequence":"additional","affiliation":[{"name":"Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u0141ukasz","family":"Koz\u0142owski","sequence":"additional","affiliation":[{"name":"Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anna","family":"Wr\u00f3blewska","sequence":"additional","affiliation":[{"name":"Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Piotr","family":"Sobotka","sequence":"additional","affiliation":[{"name":"Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0877-7282","authenticated-orcid":false,"given":"Kamil","family":"Dydek","sequence":"additional","affiliation":[{"name":"Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3694-1342","authenticated-orcid":false,"given":"Anna","family":"Boczkowska","sequence":"additional","affiliation":[{"name":"Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7913-3452","authenticated-orcid":false,"given":"Tomasz","family":"Osuch","sequence":"additional","affiliation":[{"name":"Faculty of Electronics and Information Technology, Institute of Electronic Systems, Warsaw University of Technology, 00-665 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6395-5902","authenticated-orcid":false,"given":"Alicja","family":"Anuszkiewicz","sequence":"additional","affiliation":[{"name":"Faculty of Electronics and Information Technology, Institute of Electronic Systems, Warsaw University of Technology, 00-665 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wojciech","family":"Lewoczko-Adamczyk","sequence":"additional","affiliation":[{"name":"Abt. 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