{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T17:17:23Z","timestamp":1785604643340,"version":"3.56.0"},"reference-count":22,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2018,6,8]],"date-time":"2018-06-08T00:00:00Z","timestamp":1528416000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PTDC\/EEI-TEL\/7134\/2014; IF\/01664\/2014; INITIATE."],"award-info":[{"award-number":["PTDC\/EEI-TEL\/7134\/2014; IF\/01664\/2014; INITIATE."]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This work reports on the use of an in-series silica and polymer fiber Bragg grating (FBG) to control the FBG strain sensitivities and enhance in the case of the polymer fiber Bragg grating (PFBG). Due to differences in the Young\u2019s Modulus of the fibers employed, the amount of strain is unequally distributed in each fiber section. By acting on the silica fiber length, it was possible to control the strain sensitivity of the two FBGs, allowing a polymer FBG strain sensitivity much higher than the one found in the elementary fiber to be obtained. The influence of the diameter of the polymer fiber on the strain sensitivities of the FBGs was also investigated. Results have shown that, besides the strain sensitivity control, an even greater improvement in the PFBG strain sensitivity can be achieved.<\/jats:p>","DOI":"10.3390\/s18061884","type":"journal-article","created":{"date-parts":[[2018,6,8]],"date-time":"2018-06-08T11:19:31Z","timestamp":1528456771000},"page":"1884","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Strain Sensitivity Control of an In-Series Silica and Polymer FBG"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7973-6891","authenticated-orcid":false,"given":"Ricardo","family":"Oliveira","sequence":"first","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus de Santiago, 3810-193 Aveiro, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8804-593X","authenticated-orcid":false,"given":"L\u00facia","family":"Bilro","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus de Santiago, 3810-193 Aveiro, Portugal"},{"name":"Instituto de Telecomunica\u00e7\u00f5es and I3N\/FSCOSD, Institute of Nanostructures, Nanomodelling and Nanofabrication, Physics Department of University of Aveiro, 3810-193 Aveiro, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rog\u00e9rio","family":"Nogueira","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es, Campus de Santiago, 3810-193 Aveiro, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2018,6,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Allwood, G., Wild, G., and Hinckley, S. (2017). Fiber Bragg Grating Sensors for Mainstream Industrial Processes. Electronics, 6.","DOI":"10.3390\/electronics6040092"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Qiao, X., Shao, Z., Bao, W., and Rong, Q. (2017). Fiber Bragg Grating Sensors for the Oil Industry. Sensors, 17.","DOI":"10.3390\/s17030429"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"5497","DOI":"10.1109\/JSEN.2016.2535465","article-title":"Optical Fiber Sensors in Physical Intrusion Detection Systems: A Review","volume":"16","author":"Allwood","year":"2016","journal-title":"IEEE Sens. J."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1109\/JLT.2011.2106479","article-title":"Fiber Optic Sensors in Structural Health Monitoring","volume":"29","author":"Cobo","year":"2011","journal-title":"J. Light. Technol."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Szczurowski, M.K., Martynkien, T., Statkiewicz-Barabach, G., Khan, L., Webb, D.J., Ye, C., Dulieu-Barton, J., and Urbanczyk, W. (2010, January 12\u201316). Measurements of stress-optic coefficient and Young\u2019s modulus in PMMA fibers drawn under different conditions. Proceedings of the SPIE Photonics Europe, Brussels, Belgium.","DOI":"10.1117\/12.855089"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2467","DOI":"10.1002\/mop.23660","article-title":"Elastic constant measurement for standard and photosensitive single mode optical fibres","volume":"50","author":"Antunes","year":"2008","journal-title":"Microw. Opt. Technol. Lett."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2456","DOI":"10.1109\/JLT.2014.2386346","article-title":"Experimental Study and Analysis of Hydrostatic Pressure Sensitivity of Polymer Fibre Bragg Gratings","volume":"33","author":"Bhowmik","year":"2015","journal-title":"J. Light. Technol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"256","DOI":"10.1016\/j.msea.2003.08.025","article-title":"Structural and mechanical properties of polymeric optical fiber","volume":"364","author":"Yang","year":"2004","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1161","DOI":"10.1364\/OL.42.001161","article-title":"Zeonex-PMMA microstructured polymer optical FBGs for simultaneous humidity and temperature sensing","volume":"42","author":"Woyessa","year":"2017","journal-title":"Opt. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"142","DOI":"10.3390\/fib2020142","article-title":"Ultra-High Sensitive Strain Sensor Based on Post-Processed Optical Fiber Bragg Grating","volume":"2","author":"Ferreira","year":"2014","journal-title":"Fibers"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"18575","DOI":"10.3390\/s141018575","article-title":"Sensitivity-improved strain sensor over a large range of temperatures using an etched and regenerated fiber Bragg grating","volume":"14","author":"Wang","year":"2014","journal-title":"Sensors"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"75201","DOI":"10.1088\/0957-0233\/22\/7\/075201","article-title":"High force measurement sensitivity with fiber Bragg gratings fabricated in uniform-waist fiber tapers","volume":"22","author":"Wieduwilt","year":"2011","journal-title":"Meas. Sci. Technol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"604","DOI":"10.1109\/LPT.2014.2385875","article-title":"Intrinsic high-sensitivity sensors based on etched single-mode polymer optical fibers","volume":"27","author":"Bhowmik","year":"2015","journal-title":"IEEE Photonics Technol. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"191","DOI":"10.3788\/COL20090703.0191","article-title":"A high sensitive fiber Bragg grating strain sensor with automatic temperature compensation","volume":"7","author":"Kuo","year":"2009","journal-title":"Chin. Opt. Lett."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"8578","DOI":"10.1364\/AO.46.008578","article-title":"Strain sensitivity control of fiber Bragg grating structures with fused tapers","volume":"46","author":"Silva","year":"2007","journal-title":"Appl. Opt."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"10181","DOI":"10.1364\/OE.23.010181","article-title":"Bragg gratings in a few mode microstructured polymer optical fiber in less than 30 seconds","volume":"23","author":"Oliveira","year":"2015","journal-title":"Opt. Express"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"176","DOI":"10.1016\/j.optcom.2010.08.069","article-title":"Improved thermal and strain performance of annealed polymer optical fiber Bragg gratings","volume":"284","author":"Yuan","year":"2011","journal-title":"Opt. Commun."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"5629","DOI":"10.1364\/AO.54.005629","article-title":"Smooth end face termination of microstructured, graded-index, and step-index polymer optical fibers","volume":"54","author":"Oliveira","year":"2015","journal-title":"Appl. Opt."},{"key":"ref_19","unstructured":"Norland Products (2018, May 01). Norland Optical Adhesive 86H. Available online: https:\/\/www.norlandprod.com\/adhesives\/noa86h.html."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"19731","DOI":"10.1364\/OE.19.019731","article-title":"Humidity insensitive TOPAS polymer fiber Bragg grating sensor","volume":"19","author":"Yuan","year":"2011","journal-title":"Opt. Express"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1364\/OME.7.000286","article-title":"Zeonex microstructured polymer optical fiber: Fabrication friendly fibers for high temperature and humidity insensitive Bragg grating sensing","volume":"7","author":"Woyessa","year":"2017","journal-title":"Opt. Mater. Express"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Nogueira, R.N., Bilro, L., Marques, C., Oliveira, R., and Heidarialamdarloo, J. (2013, January 11\u201313). Bragg Gratings in Plastic Optical Fibre for Communications and Sensing Applications. Proceedings of the 22nd International Conference on Plastic Optical Fibers, B\u00fazios, Brazil.","DOI":"10.1109\/ICTON.2013.6603054"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/6\/1884\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:07:54Z","timestamp":1760195274000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/6\/1884"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,6,8]]},"references-count":22,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2018,6]]}},"alternative-id":["s18061884"],"URL":"https:\/\/doi.org\/10.3390\/s18061884","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,6,8]]}}}