{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,21]],"date-time":"2025-10-21T15:28:50Z","timestamp":1761060530633,"version":"build-2065373602"},"reference-count":56,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2018,3,1]],"date-time":"2018-03-01T00:00:00Z","timestamp":1519862400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Fibers"],"abstract":"<jats:p>This paper presents the achievements and progress made on the polymer optical fiber (POF) gratings inscription in different types of Fiber Bragg Gratings (FBGs) and long period gratings (LPGs). Since the first demonstration of POFBGs in 1999, significant progress has been made where the inscription times that were higher than 1 h have been reduced to 15 ns with the application of the krypton fluoride (KrF) pulsed laser operating at 248 nm and thermal treatments such as the pre-annealing of fibers. In addition, the application of dopants such as benzyl dimethyl ketal (BDK) has provided a significant decrease of the fiber inscription time. Furthermore, such improvements lead to the possibility of inscribing POF gratings in 850 nm and 600 nm, instead of only the 1550 nm region. The progress on the inscription of different types of polymer optical fiber Bragg gratings (POFBGs) such as chirped POFBGs and phase-shifted POFBGs are also reported in this review.<\/jats:p>","DOI":"10.3390\/fib6010013","type":"journal-article","created":{"date-parts":[[2018,3,1]],"date-time":"2018-03-01T12:15:44Z","timestamp":1519906544000},"page":"13","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":69,"title":["Advances on Polymer Optical Fiber Gratings Using a KrF Pulsed Laser System Operating at 248 nm"],"prefix":"10.3390","volume":"6","author":[{"given":"Carlos","family":"Marques","sequence":"first","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es and Physics, Department &amp; I3N, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9075-0619","authenticated-orcid":false,"given":"Arnaldo","family":"Leal-Junior","sequence":"additional","affiliation":[{"name":"Graduate Program of Electrical Engineering of Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7900-0422","authenticated-orcid":false,"given":"Rui","family":"Min","sequence":"additional","affiliation":[{"name":"ITEAM Research Institute, Universitat Polit\u00e8cnica de Val\u00e8ncia, 46022 Valencia, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9958-0409","authenticated-orcid":false,"given":"Maria","family":"Domingues","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\/0000-0002-6331-1215","authenticated-orcid":false,"given":"C\u00e1tia","family":"Leit\u00e3o","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\/0000-0001-9129-3539","authenticated-orcid":false,"given":"Paulo","family":"Antunes","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es and Physics, Department &amp; I3N, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Beatriz","family":"Ortega","sequence":"additional","affiliation":[{"name":"ITEAM Research Institute, Universitat Polit\u00e8cnica de Val\u00e8ncia, 46022 Valencia, Spain"}]},{"given":"Paulo","family":"Andr\u00e9","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es and Department of Electrical and Computer Engineering, Instituto Superior T\u00e9cnico, University of Lisbon, 1649-004 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2018,3,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"92004","DOI":"10.1088\/0957-0233\/26\/9\/092004","article-title":"Fibre Bragg grating sensors in polymer optical fibres","volume":"26","author":"Webb","year":"2015","journal-title":"Meas. 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