{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T15:41:42Z","timestamp":1775144502993,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T00:00:00Z","timestamp":1638748800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000038","name":"Natural Sciences and Engineering Research Council","doi-asserted-by":"publisher","award":["RGPIN 2019-05038"],"award-info":[{"award-number":["RGPIN 2019-05038"]}],"id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000038","name":"Natural Sciences and Engineering Research Council","doi-asserted-by":"publisher","award":["RGPIN-2016-05877"],"award-info":[{"award-number":["RGPIN-2016-05877"]}],"id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Fiber Bragg gratings (FBGs) are valuable dosimeters for doses up to 100 kilograys (kGy), but have hardly been used for the low-dose range of a few grays (Gy) required in medical radiation dosimetry. We report that embedding a doped silica fiber FBG in a polymer material allows a minimum detectable dose of 0.3 Gy for \u03b3-radiation. Comparing the detector response for different doped silica fibers with various core doping, we obtain an independent response, in opposition to what is reported for high-dose range. We hypothesized that the sensor detection is based on the radio-induced thermal expansion of the surrounding polymer. Hence, we used a simple physical model based on the thermal and mechanical properties of the surrounding polymer and obtained good accordance between measured and calculated values for different compositions and thicknesses. We report that over the 4 embedding polymers tested, polyether ether ketone and polypropylene have respectively the lowest (0.056 pm\/Gy) and largest sensitivity (0.087 pm\/Gy). Such FBG-based dosimeters have the potential to be distributed along the fiber to allow multipoint detection while having a sub-millimeter size that could prove very useful for low-dose applications, in particular for radiotherapy dosimetry.<\/jats:p>","DOI":"10.3390\/s21238139","type":"journal-article","created":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T22:18:42Z","timestamp":1638829122000},"page":"8139","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Medical Range Radiation Dosimeter Based on Polymer-Embedded Fiber Bragg Gratings"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8003-1397","authenticated-orcid":false,"given":"Marie-Anne","family":"Lebel-Cormier","sequence":"first","affiliation":[{"name":"D\u00e9partement de Physique, de G\u00e9nie Physique et D\u2019optique, Universit\u00e9 Laval, Qu\u00e9bec, QC G1V 0A6, Canada"},{"name":"Centre de Recherche sur le Cancer, Universit\u00e9 Laval, Qu\u00e9bec, QC G1R 3S3, Canada"},{"name":"CHU de Qu\u00e9bec, Universit\u00e9 Laval et CRCHU de Qu\u00e9bec, Qu\u00e9bec, QC G1R 2J6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3072-693X","authenticated-orcid":false,"given":"Tommy","family":"Boilard","sequence":"additional","affiliation":[{"name":"D\u00e9partement de Physique, de G\u00e9nie Physique et D\u2019optique, Universit\u00e9 Laval, Qu\u00e9bec, QC G1V 0A6, Canada"},{"name":"Centre D\u2019optique, Photonique et Laser (COPL), Universit\u00e9 Laval, Qu\u00e9bec, QC G1V 0A6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin","family":"Bernier","sequence":"additional","affiliation":[{"name":"D\u00e9partement de Physique, de G\u00e9nie Physique et D\u2019optique, Universit\u00e9 Laval, Qu\u00e9bec, QC G1V 0A6, Canada"},{"name":"Centre D\u2019optique, Photonique et Laser (COPL), Universit\u00e9 Laval, Qu\u00e9bec, QC G1V 0A6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0429-6366","authenticated-orcid":false,"given":"Luc","family":"Beaulieu","sequence":"additional","affiliation":[{"name":"D\u00e9partement de Physique, de G\u00e9nie Physique et D\u2019optique, Universit\u00e9 Laval, Qu\u00e9bec, QC G1V 0A6, Canada"},{"name":"Centre de Recherche sur le Cancer, Universit\u00e9 Laval, Qu\u00e9bec, QC G1R 3S3, Canada"},{"name":"CHU de Qu\u00e9bec, Universit\u00e9 Laval et CRCHU de Qu\u00e9bec, Qu\u00e9bec, QC G1R 2J6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,6]]},"reference":[{"key":"ref_1","first-page":"173","article-title":"A review on optical fiber sensors for environmental monitoring","volume":"5","author":"Joe","year":"2018","journal-title":"Int. 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