{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T14:22:12Z","timestamp":1779200532533,"version":"3.51.4"},"reference-count":27,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2019,9,28]],"date-time":"2019-09-28T00:00:00Z","timestamp":1569628800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, we demonstrated a novel, all-fiber highly sensitive bend sensor based on a four-core fiber rod with a diameter of 2.1 mm. We observed a high resolution of the sensor at a level of 3.6 \u00d7 10\u22123 m\u22121. Such a sensor design can be used in harsh environments due to the relatively small size and all-fiber configuration, containing no adhesive, nor welded joints.<\/jats:p>","DOI":"10.3390\/s19194228","type":"journal-article","created":{"date-parts":[[2019,9,30]],"date-time":"2019-09-30T05:58:33Z","timestamp":1569823113000},"page":"4228","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["All-Fiber Highly Sensitive Bragg Grating Bend Sensor"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5464-4034","authenticated-orcid":false,"given":"Oleg V.","family":"Butov","sequence":"first","affiliation":[{"name":"Kotelnikov Institute of Radioengineering and Electronics of RAS, 11-7, Mokhovaya str., Moscow 125009, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5345-2025","authenticated-orcid":false,"given":"Alexey P.","family":"Bazakutsa","sequence":"additional","affiliation":[{"name":"Kotelnikov Institute of Radioengineering and Electronics of RAS, 11-7, Mokhovaya str., Moscow 125009, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuri K.","family":"Chamorovskiy","sequence":"additional","affiliation":[{"name":"Kotelnikov Institute of Radioengineering and Electronics of RAS (Fryazino Branch), Vvedenskogo sq.1, Moscow reg, Fryazino 141120, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Artem N.","family":"Fedorov","sequence":"additional","affiliation":[{"name":"Prolog LLC, P.O. 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Overview of fiber optic sensor technologies for strain\/temperature sensing applications in composite materials. Sensors, 16.","DOI":"10.3390\/s16010099"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Butov, O.V., Chamorovskii, Y.K., Golant, K.M., Shevtsov, I.A., and Fedorov, A.N. (2014, January 2\u20136). Fibers and sensors for monitoring nuclear power plants operation. Proceedings of the 23rd International Conference on Optical Fibre Sensors, Santander, Spain.","DOI":"10.1117\/12.2059041"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"765314","DOI":"10.1117\/12.866334","article-title":"A fibre Bragg grating based inclinometer system for ground movement measurement","volume":"7653","author":"Li","year":"2010","journal-title":"Fourth Eur. Workshop Opt. 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Lett."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"24727","DOI":"10.1364\/OE.25.024727","article-title":"Dual-layer orthogonal fiber Bragg grating mesh based soft sensor for 3-dimensional shape sensing","volume":"25","author":"Xu","year":"2017","journal-title":"Opt. Express"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Sefati, S., Pozin, M., Alambeigi, F., Iordachita, I., Taylor, R.H., and Armand, M. (November, January 29). A highly sensitive fiber Bragg Grating shape sensor for continuum manipulators with large deflections. Proceedings of the 2017 IEEE SENSORS, Glasgow, UK.","DOI":"10.1109\/ICSENS.2017.8234018"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1364\/OL.18.000072","article-title":"Fiber-optic Bragg grating strain sensor with drift-compensated high-resolution interferometric wavelength-shift detection","volume":"18","author":"Kersey","year":"1993","journal-title":"Opt. Lett."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1016\/S0030-4018(01)01157-9","article-title":"Simultaneous displacement and temperature measurement with cantilever-based fiber Bragg grating sensor","volume":"192","author":"Dong","year":"2001","journal-title":"Opt. Commun."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1085","DOI":"10.1049\/el:19940746","article-title":"Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors","volume":"30","author":"Xu","year":"1994","journal-title":"Electr. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"407","DOI":"10.1117\/12.191857","article-title":"Structural Bending Sensor Using Fibre Gratings","volume":"2292","author":"Xu","year":"1994","journal-title":"SPIE Fiber Opt. Laser Sens. XII"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1364\/OL.28.000387","article-title":"Two-axis bend measurement with Bragg gratings in multicore optical fiber","volume":"28","author":"Flockhart","year":"2003","journal-title":"Opt. Lett."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1088\/0964-1726\/9\/2\/302","article-title":"Two-dimensional bend sensing with a single, multi-core optical fibre","volume":"9","author":"Blanchard","year":"2000","journal-title":"Smart Mater. Struct."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/S0030-4018(00)00817-8","article-title":"Two-axis bend measurement using multicore optical fibre","volume":"182","author":"Gander","year":"2000","journal-title":"Opt. Commun."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2445","DOI":"10.1109\/JLT.2014.2366556","article-title":"Multipoint two-dimensional curvature optical fiber sensor based on a nontwisted homogeneous four-core fiber","volume":"33","author":"Barrera","year":"2014","journal-title":"J. Lightwave Technol."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Barrera, D., and Sales, S. (2014). Multipoint two-dimensional curvature optical fibre sensor. Proc. SPIE, 9157.","DOI":"10.1117\/12.2059548"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1180","DOI":"10.1088\/0957-0233\/17\/5\/S41","article-title":"Tunnel monitoring using multicore fibre displacement sensor","volume":"17","author":"MacPherson","year":"2006","journal-title":"Meas. Sci. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2967","DOI":"10.1364\/OE.20.002967","article-title":"Shape sensing using multi-core fiber optic cable and parametric curve solutions","volume":"20","author":"Moore","year":"2012","journal-title":"Opt. Express"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"520","DOI":"10.1049\/el:20060731","article-title":"Ultra-high-sensitivity two-dimensional bend sensor","volume":"42","author":"Cranch","year":"2006","journal-title":"Electron. Lett."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"4670","DOI":"10.1109\/JLT.2017.2750407","article-title":"Femtosecond laser inscription of fiber Bragg grating in twin-core few-mode fiber for directional bend sensing","volume":"35","author":"Yang","year":"2017","journal-title":"J. Lightwave Technol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1170","DOI":"10.1049\/el:20046050","article-title":"Direct writing of fibre Bragg gratings by femtosecond laser","volume":"40","author":"Martinez","year":"2004","journal-title":"Electron. Lett."},{"key":"ref_25","unstructured":"Gere, J.M., and Timoshenko, S.P. (2002). Mechanics of Materials, Nelson Thornes. [5th ed.]."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"2242","DOI":"10.1021\/ac50064a004","article-title":"Guidelines for data acquisition and data quality evaluation in environmental chemistry","volume":"52","author":"MacDougall","year":"1980","journal-title":"Anal. Chem."},{"key":"ref_27","first-page":"712A","article-title":"Limit of Detection a Closer Look at the IUPAC Definition","volume":"55","author":"Long","year":"1983","journal-title":"Anal. Chem."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/19\/4228\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:25:38Z","timestamp":1760189138000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/19\/4228"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,9,28]]},"references-count":27,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2019,10]]}},"alternative-id":["s19194228"],"URL":"https:\/\/doi.org\/10.3390\/s19194228","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,9,28]]}}}