{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T10:10:53Z","timestamp":1760523053197,"version":"build-2065373602"},"reference-count":30,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2013,5,14]],"date-time":"2013-05-14T00:00:00Z","timestamp":1368489600000},"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>In this work an Intrinsic Fabry-Perot Interferometer (IFPI) based on an  air-microcavity is presented. Here the air microcavity, with silica walls, is formed at a segment of a hollow core photonic crystal fiber (HCPCF), which is fusion spliced with a single mode fiber (SMF). Moreover, the spectral response of the IFPI is experimentally characterized and some results are provided. Finally, the viability to use the IFPI to implement a simple, compact size, and low cost refractive index sensor is briefly analyzed.<\/jats:p>","DOI":"10.3390\/s130506355","type":"journal-article","created":{"date-parts":[[2013,5,14]],"date-time":"2013-05-14T11:21:04Z","timestamp":1368530464000},"page":"6355-6364","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["An All Fiber Intrinsic Fabry-Perot Interferometer  Based on an Air-Microcavity"],"prefix":"10.3390","volume":"13","author":[{"given":"Daniel","family":"J\u00e1uregui-V\u00e1zquez","sequence":"first","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"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4010-3800","authenticated-orcid":false,"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"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9487-0354","authenticated-orcid":false,"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":"Everardo","family":"Vargas-Rodr\u00edguez","sequence":"additional","affiliation":[{"name":"Espintr\u00f3nica y \u00d3ptica Aplicada-CA, Departamento de Estudios Multidiciplinarios, DICIS, Universidad de Guanajuato, Avenida Universidad s\/n, Col. Yacatitas, Yuriria, Gto 38940, Mexico"}]},{"given":"Juan","family":"Sierra-Hern\u00e1ndez","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"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8803-8692","authenticated-orcid":false,"given":"Ruth","family":"Mata-Ch\u00e1vez","sequence":"additional","affiliation":[{"name":"Espintr\u00f3nica y \u00d3ptica Aplicada-CA, Departamento de Estudios Multidiciplinarios, DICIS, Universidad de Guanajuato, Avenida Universidad s\/n, Col. Yacatitas, Yuriria, Gto 38940, Mexico"}]}],"member":"1968","published-online":{"date-parts":[[2013,5,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2252","DOI":"10.1364\/OE.16.002252","article-title":"Laser-micromachined Fabry-Perot optical fiber tip sensor for high resolution temperature independent measurement of refractive index","volume":"16","author":"Ran","year":"2008","journal-title":"Opt. 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