{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:31:01Z","timestamp":1760243461215,"version":"build-2065373602"},"reference-count":20,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2013,3,4]],"date-time":"2013-03-04T00:00:00Z","timestamp":1362355200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A compact high temperature fiber sensor where the sensor head consists of a short fattened long period fiber grating (F-LPFG) of at least 2 mm in length and background loss of \u22125 dBm is reported. On purpose two different F-LPFGs were used to measure temperature variations, taking advantage of their broad spectrum and the slope characteristics of the erbium light source. This approach affected the spectrum gain as the linear band shifting took place. The measured sensitivity of the long period fiber gratings were about 72 pm\/\u00b0C in a range from 25 to 500 \u00b0C. Here, the temperature rate of the experiment was 0.17 \u00b0C\/s and the temperature response time was within 3 s. Moreover, temperature changes were detected with an InGaAs photodetector, where a sensitivity of 0.05 mV\/\u00b0C was achieved.<\/jats:p>","DOI":"10.3390\/s130303028","type":"journal-article","created":{"date-parts":[[2013,3,4]],"date-time":"2013-03-04T11:03:50Z","timestamp":1362395030000},"page":"3028-3038","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["High Temperature Optical Fiber Sensor Based on Compact Fattened Long-Period Fiber Gratings"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8803-8692","authenticated-orcid":false,"given":"Ruth","family":"Mata-Ch\u00e1vez","sequence":"first","affiliation":[{"name":"Espintr\u00f3nica y \u00d3ptica Aplicada-CA, Departamento de Estudios Multidisciplinarios, DICIS, Universidad de Guanajuato, Av. Universidad s\/n, Col. Yacatitas, Yuriria, Gto, 38940, Mexico"}]},{"given":"Alejandro","family":"Mart\u00ednez-Rios","sequence":"additional","affiliation":[{"name":"Centro de Investigaciones en \u00d3ptica, Loma del Bosque 115, Col. Lomas del Campestre, Le\u00f3n, Guanajuato, 37150, Mexico"}]},{"given":"Juli\u00e1n","family":"Estudillo-Ayala","sequence":"additional","affiliation":[{"name":"Optoelectr\u00f3nica-CA, Departamento de Electr\u00f3nica, DICIS, Universidad de Guanajuato,  Carr. Salamanca-Valle Km 3.5 + 1.8, Palo Blanco, Salamanca, Gto, 36855, Mexico"}]},{"given":"Everardo","family":"Vargas-Rodr\u00edguez","sequence":"additional","affiliation":[{"name":"Espintr\u00f3nica y \u00d3ptica Aplicada-CA, Departamento de Estudios Multidisciplinarios, DICIS, Universidad de Guanajuato, Av. Universidad s\/n, Col. Yacatitas, Yuriria, Gto, 38940, Mexico"}]},{"given":"Roberto","family":"Rojas-Laguna","sequence":"additional","affiliation":[{"name":"Optoelectr\u00f3nica-CA, Departamento de Electr\u00f3nica, DICIS, Universidad de Guanajuato,  Carr. Salamanca-Valle Km 3.5 + 1.8, Palo Blanco, Salamanca, Gto, 36855, Mexico"}]},{"given":"Juan","family":"Hern\u00e1ndez-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Optoelectr\u00f3nica-CA, Departamento de Electr\u00f3nica, DICIS, Universidad de Guanajuato,  Carr. Salamanca-Valle Km 3.5 + 1.8, Palo Blanco, Salamanca, Gto, 36855, Mexico"}]},{"given":"Ana","family":"Guzm\u00e1n-Ch\u00e1vez","sequence":"additional","affiliation":[{"name":"Espintr\u00f3nica y \u00d3ptica Aplicada-CA, Departamento de Estudios Multidisciplinarios, DICIS, Universidad de Guanajuato, Av. Universidad s\/n, Col. 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