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The RBEF features randomly high backscattering points; the analysis of the fiber position shift of these points before and after the temperature change along the fiber is achieved using the sliding cross-correlation method. The fiber position and temperature variation can be accurately demodulated by calibrating the mathematical relationship between the high backscattering point position along the RBEF and the temperature variation. Experimental results reveal a linear relationship between temperature variation and the total position displacement of high backscattering points. The temperature sensing sensitivity coefficient is 7.814 \u03bcm\/(m\u00b7\u00b0C), with an average relative error temperature measurement of \u22121.12% and positioning error as low as 0.02 m for the temperature-influenced fiber segment. In the proposed demodulation method, the spatial resolution of temperature sensing is determined by the distribution of high backscattering points. The temperature sensing resolution depends on the spatial resolution of the OFDR system and the length of the temperature-influenced fiber. With an OFDR system spatial resolution of 12.5 \u03bcm, the temperature sensing resolution reaches 0.418 \u00b0C per meter of RBEF under test.<\/jats:p>","DOI":"10.3390\/s23125748","type":"journal-article","created":{"date-parts":[[2023,6,21]],"date-time":"2023-06-21T02:30:51Z","timestamp":1687314651000},"page":"5748","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber"],"prefix":"10.3390","volume":"23","author":[{"given":"Ziyi","family":"Lu","sequence":"first","affiliation":[{"name":"Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, China"},{"name":"Hebei Provincial Center for Optical Sensing Innovations, Baoding 071002, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5170-8365","authenticated-orcid":false,"given":"Ting","family":"Feng","sequence":"additional","affiliation":[{"name":"Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, China"},{"name":"Hebei Provincial Center for Optical Sensing Innovations, Baoding 071002, China"}]},{"given":"Fang","family":"Li","sequence":"additional","affiliation":[{"name":"Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, China"},{"name":"Hebei Provincial Center for Optical Sensing Innovations, Baoding 071002, China"}]},{"given":"Xiaotian Steve","family":"Yao","sequence":"additional","affiliation":[{"name":"Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, China"},{"name":"Hebei Provincial Center for Optical Sensing Innovations, Baoding 071002, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1016\/S1068-5200(02)00527-8","article-title":"Review of the present status of optical fiber sensors","volume":"9","author":"Lee","year":"2003","journal-title":"Opt. Fiber Technol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"8601","DOI":"10.3390\/s120708601","article-title":"Recent progress in distributed fiber optic sensors","volume":"12","author":"Bao","year":"2012","journal-title":"Sensors"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1407","DOI":"10.1109\/JLT.2021.3135653","article-title":"A Review of Distributed Fiber\u2013Optic Sensing in the Oil and Gas Industry","volume":"40","author":"Ashry","year":"2022","journal-title":"J. Light. Technol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"25989","DOI":"10.1364\/OE.26.025989","article-title":"Distributed polarization analysis with binary polarization rotators for the accurate measurement of distance-resolved birefringence along a single-mode fiber","volume":"26","author":"Feng","year":"2018","journal-title":"Opt. Express"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"31253","DOI":"10.1364\/OE.405682","article-title":"Distributed transverse-force sensing along a single-mode fiber using polarization-analyzing OFDR","volume":"28","author":"Feng","year":"2020","journal-title":"Opt. Express"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"5347","DOI":"10.1364\/OE.452756","article-title":"Clamping-force induced birefringence in a single-mode fiber in commercial V-grooves investigated with distributed polarization analysis","volume":"30","author":"Feng","year":"2022","journal-title":"Opt. Express"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"434","DOI":"10.1049\/el:19850309","article-title":"OFDR diagnostics for fibre and integrated optic systems","volume":"21","author":"Kingsley","year":"1985","journal-title":"Electron. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"971","DOI":"10.1109\/JLT.1985.1074315","article-title":"Precision time domain reflectometry in optical fiber systems using a frequency modulated continuous wave ranging technique","volume":"3","author":"Uttam","year":"1985","journal-title":"J. Light. Technol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"114","DOI":"10.1364\/AO.26.000114","article-title":"Swept wavelength reflectometer for integrated-optic measurements","volume":"26","author":"MacDonald","year":"1987","journal-title":"Appl. Opt."},{"key":"ref_10","unstructured":"Kreger, S.T., Gifford, D.K., Froggatt, M.E., Soller, B.J., and Wolfe, M.S. (2006). Optical Fiber Sensors, Optica Publishing Group."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1735","DOI":"10.1364\/AO.37.001735","article-title":"High-spatial-resolution distributed strain measurement in optical fiber with Rayleigh scatter","volume":"37","author":"Froggatt","year":"1998","journal-title":"Appl. Opt."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Gifford, D.K., Froggatt, M.E., and Kreger, S.T. (2011, January 15\u201319). High precision, high sensitivity distributed displacement and temperature measurements using OFDR-based phase tracking. Proceedings of the 21st International Conference on Optical Fiber Sensors, Ottawa, ON, Canada.","DOI":"10.1117\/12.885131"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"27913","DOI":"10.1364\/OE.25.027913","article-title":"High spatial resolution distributed fiber strain sensor based on phase-OFDR","volume":"25","author":"Li","year":"2017","journal-title":"Opt. Express"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"5514","DOI":"10.1364\/OL.40.005514","article-title":"Optical fiber random grating-based multiparameter sensor","volume":"40","author":"Xu","year":"2015","journal-title":"Opt. Lett."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"4697","DOI":"10.1109\/JLT.2019.2917389","article-title":"Low-Loss Random Fiber Gratings Made With an fs-IR Laser for Distributed Fiber Sensing","volume":"37","author":"Lu","year":"2019","journal-title":"J. Light. Technol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2127","DOI":"10.1109\/50.908823","article-title":"Distributed gain measurements in Er-doped fibers with high resolution and accuracy using an optical frequency domain reflectometer","volume":"18","author":"Wegmuller","year":"2000","journal-title":"J. Light. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Westbrook, P.S., Feder, K.S., Ortiz, R.M., Kremp, T., Monberg, E.M., Wu, H., Simoff, D.A., and Shenk, S. (2017, January 24\u201328). Kilometer length, low loss enhanced back scattering fiber for distributed sensing. Proceedings of the 2017 25th Optical Fiber Sensors Conference (OFS), Jeju, Republic of Korea.","DOI":"10.1109\/OFS.2017.7961121"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"11177","DOI":"10.1038\/srep11177","article-title":"Rayleigh scatter based order of magnitude increase in distributed temperature and strain sensing by simple UV exposure of optical fibre","volume":"5","author":"Loranger","year":"2015","journal-title":"Sci. Rep."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Bulot, P., Bernard, R., Cieslikiewicz-Bouet, M., Laffont, G., and Douay, M. (2021). Performance study of a Zirconia-Doped fiber for distributed temperature sensing by OFDR at 800 C. Sensors, 21.","DOI":"10.3390\/s21113788"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1898","DOI":"10.3390\/s120201898","article-title":"Fiber Bragg grating sensors for harsh environments","volume":"12","author":"Mihailov","year":"2012","journal-title":"Sensors"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1150","DOI":"10.1109\/LPT.2014.2317702","article-title":"Cryogenic temperature measurement using Rayleigh backscattering spectra shift by OFDR","volume":"26","author":"Du","year":"2014","journal-title":"IEEE Photonics Technol. Lett."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1016\/j.optcom.2020.126490","article-title":"A novel positioning and temperature measurement method based on optical domain demodulation in the BOTDR system","volume":"480","author":"Fu","year":"2021","journal-title":"Opt. Commun."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"4299","DOI":"10.1364\/OL.467617","article-title":"Closed-loop technique based on gain balancing for real-time Brillouin optical time-domain analysis","volume":"47","author":"Zhang","year":"2022","journal-title":"Opt. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Wu, H., Du, H., Zhao, C., and Tang, M. (2022). 24 km high-performance Raman distributed temperature sensing using low water peak fiber and optimized denoising neural network. Sensors, 22.","DOI":"10.3390\/s22062139"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"2594","DOI":"10.1109\/JLT.2021.3052036","article-title":"Centimeter Spatial Resolution Distributed Temperature Sensor Based on Polarization-Sensitive Optical Frequency Domain Reflectometry","volume":"39","author":"Li","year":"2021","journal-title":"J. Light. Technol."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/12\/5748\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T19:57:06Z","timestamp":1760126226000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/12\/5748"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,6,20]]},"references-count":25,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2023,6]]}},"alternative-id":["s23125748"],"URL":"https:\/\/doi.org\/10.3390\/s23125748","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,6,20]]}}}