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The operation principle of the sensor is the variation in the POF mechanical properties with the temperature variation. Such mechanical property variation leads to a variation in the POF output power when a constant stress is applied to the fiber due to the stress-optical effect. The fiber mechanical properties are characterized through a dynamic mechanical analysis, and the output power variation with different temperatures is measured. The stress is applied to the fiber by means of a 180\u00b0 curvature, and supports are positioned on the fiber to inhibit the variation in its curvature with the temperature variation. Results show that the sensor proposed has a sensitivity of 1.04 \u00d7 10\u22123 \u00b0C\u22121, a linearity of 0.994, and a root mean squared error of 1.48 \u00b0C, which indicates a relative error of below 2%, which is lower than the ones obtained for intensity-variation-based temperature sensors. Furthermore, the sensor is able to operate at temperatures up to 110 \u00b0C, which is higher than the ones obtained for similar POF sensors in the literature.<\/jats:p>","DOI":"10.3390\/s18010301","type":"journal-article","created":{"date-parts":[[2018,1,22]],"date-time":"2018-01-22T04:51:13Z","timestamp":1516596673000},"page":"301","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":84,"title":["A Polymer Optical Fiber Temperature Sensor Based on Material Features"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9075-0619","authenticated-orcid":false,"given":"Arnaldo","family":"Leal-Junior","sequence":"first","affiliation":[{"name":"Graduate Program of Electrical Engineering, Federal University of Espirito Santo, Vit\u00f3ria-ES 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0687-3967","authenticated-orcid":false,"given":"Anselmo","family":"Frizera-Neto","sequence":"additional","affiliation":[{"name":"Graduate Program of Electrical Engineering, Federal University of Espirito Santo, Vit\u00f3ria-ES 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8596-5092","authenticated-orcid":false,"given":"Carlos","family":"Marques","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es and Physics Department &amp; I3N, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9009-2425","authenticated-orcid":false,"given":"Maria","family":"Pontes","sequence":"additional","affiliation":[{"name":"Graduate Program of Electrical Engineering, Federal University of Espirito Santo, Vit\u00f3ria-ES 29075-910, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2018,1,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"13076","DOI":"10.3390\/s131013076","article-title":"A temperature sensor based on a polymer optical fiber macro-bend","volume":"13","author":"Moraleda","year":"2013","journal-title":"Sensors"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"779","DOI":"10.1109\/50.580812","article-title":"In-fiber bragg-grating temperature sensor system for medical applications","volume":"15","author":"Rao","year":"1997","journal-title":"J. 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