{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T08:37:01Z","timestamp":1776069421391,"version":"3.50.1"},"reference-count":39,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2021,8,30]],"date-time":"2021-08-30T00:00:00Z","timestamp":1630281600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004225","name":"Petrobras","doi-asserted-by":"publisher","award":["2017-00702\/6"],"award-info":[{"award-number":["2017-00702\/6"]}],"id":[{"id":"10.13039\/501100004225","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","award":["001"],"award-info":[{"award-number":["001"]}],"id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Optical fiber sensors based on fiber Bragg gratings (FBGs) are prone to measurement errors if the cross-sensitivity between temperature and strain is not properly considered. This paper describes a self-compensated technique for canceling the undesired influence of temperature in strain measurement. An edge-filter-based interrogator is proposed and the central peaks of two FBGs (sensor and reference) are matched with the positive and negative slopes of a Fabry\u2013Perot interferometer that acts as an optical filter. A tuning process performed by the grey wolf optimizer (GWO) algorithm is required to determine the optimal spectral characteristics of each FBG. The interrogation range is not compromised by the proposed technique, being determined by the spectral characteristics of the optical filter in accordance with the traditional edge-filtering interrogation. Simulations show that, by employing FBGs with optimal characteristics, temperature variations of 30 \u00b0C led to an average relative error of 3.4% for strain measurements up to 700\u03bc\u03f5. The proposed technique was experimentally tested under non-ideal conditions: two FBGs with spectral characteristics different from the optimized results were used. The temperature sensibility decreased by 50.8% as compared to a temperature uncompensated interrogation system based on an edge filter. The non-ideal experimental conditions were simulated and the maximum error between theoretical and experimental data was 5.79%, proving that the results from simulation and experimentation are compatible.<\/jats:p>","DOI":"10.3390\/s21175828","type":"journal-article","created":{"date-parts":[[2021,8,31]],"date-time":"2021-08-31T22:58:15Z","timestamp":1630450695000},"page":"5828","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["An Optimized Self-Compensated Solution for Temperature and Strain Cross-Sensitivity in FBG Interrogators Based on Edge Filter"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0368-5629","authenticated-orcid":false,"given":"Mariana L.","family":"Silveira","sequence":"first","affiliation":[{"name":"Telecommunications Laboratory LABTEL, Electrical Engineering Department, Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6215-664X","authenticated-orcid":false,"given":"Helder R. O.","family":"Rocha","sequence":"additional","affiliation":[{"name":"Telecommunications Laboratory LABTEL, Electrical Engineering Department, Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9129-3539","authenticated-orcid":false,"given":"Paulo F. C.","family":"Antunes","sequence":"additional","affiliation":[{"name":"I3N & Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"},{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6276-4976","authenticated-orcid":false,"given":"Paulo S. B.","family":"Andr\u00e9","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Instituto de Telecomunica\u00e7\u00f5es, Instituto Superior T\u00e9cnico, University of Lisbon, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4083-992X","authenticated-orcid":false,"given":"Marcelo E. V.","family":"Segatto","sequence":"additional","affiliation":[{"name":"Telecommunications Laboratory LABTEL, Electrical Engineering Department, Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0687-3967","authenticated-orcid":false,"given":"Anselmo","family":"Frizera","sequence":"additional","affiliation":[{"name":"Telecommunications Laboratory LABTEL, Electrical Engineering Department, Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9657-5076","authenticated-orcid":false,"given":"Camilo A. R.","family":"D\u00edaz","sequence":"additional","affiliation":[{"name":"Telecommunications Laboratory LABTEL, Electrical Engineering Department, Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"21","DOI":"10.2174\/1874328501307010021","article-title":"Optical Fibre Sensors: A Current Perspective","volume":"7","author":"Culshaw","year":"2014","journal-title":"Open Opt. J."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2467","DOI":"10.3390\/s120302467","article-title":"Interferometric fiber optic sensors","volume":"12","author":"Lee","year":"2012","journal-title":"Sensors"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1263","DOI":"10.1109\/50.618320","article-title":"Fiber Bragg grating technology fundamentals and overview","volume":"15","author":"Hill","year":"1997","journal-title":"J. Light. 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