{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,9,20]],"date-time":"2023-09-20T15:33:46Z","timestamp":1695224026711},"reference-count":14,"publisher":"EDP Sciences","license":[{"start":{"date-parts":[[2020,8,20]],"date-time":"2020-08-20T00:00:00Z","timestamp":1597881600000},"content-version":"vor","delay-in-days":232,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["EPJ Web Conf."],"published-print":{"date-parts":[[2020]]},"abstract":"<jats:p>In this work, a long-period fiber grating (LPG) based sensor was evaluated as a sensing device for micro-force measurement, in the order of micro Newtons. It was used an LPG fabricated by arc-inducted technique in a SMF-28 standard optical fiber. The optical fiber was fixed between two clamps with a separation of 150 mm with the middle of the LPG located at the center. Characterizations were performed in terms of temperature, curvature and strain. The grating was then used as a micro-force sensor by means of both curvature and strain, induced by a hung mass in a stretched fiber. Furthermore, the evaluation of a precurvature LPG was performed to assess if an increase of sensitivity is achieved. Micro-force sensitivity achieved with the stretched LPG was 1.41 nm\/mN and it was demonstrated that its sensitivity can be enhanced to 5.14 nm\/mN with a pre-curvature of 2.2 m<jats:sup>\u20131<\/jats:sup> applied to the LPG, achieving a spectral resolution of at least 15.6 \u03bcN.<\/jats:p>","DOI":"10.1051\/epjconf\/202023812009","type":"journal-article","created":{"date-parts":[[2020,8,20]],"date-time":"2020-08-20T18:45:08Z","timestamp":1597949108000},"page":"12009","source":"Crossref","is-referenced-by-count":1,"title":["Micro-force measurement with pre-curvature long-period fiber grating-based sensor"],"prefix":"10.1051","volume":"238","author":[{"given":"Walter S. J.","family":"Ferreira","sequence":"first","affiliation":[]},{"given":"Paulo S. S.","family":"dos Santos","sequence":"additional","affiliation":[]},{"given":"Paulo","family":"Caldas","sequence":"additional","affiliation":[]},{"given":"Pedro A. S.","family":"Jorge","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o M. S.","family":"Sakamoto","sequence":"additional","affiliation":[]}],"member":"250","published-online":{"date-parts":[[2020,8,20]]},"reference":[{"issue":"11","key":"R1","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1364\/OE.4.000457","volume":"4","author":"Bhatia","year":"1999","journal-title":"Opt. Express"},{"key":"R2","unstructured":"Zhao X.-W. and Wang Q., \u201cMini review: Recent advances in long period fiber grating biological and chemical sensors,\u201d Instrum. Sci. Technol., pp. 1\u201330, Sep. 2018."},{"issue":"9","key":"R3","doi-asserted-by":"crossref","first-page":"692","DOI":"10.1364\/OL.21.000692","volume":"21","author":"Bhatia","year":"1996","journal-title":"Opt. 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