{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,25]],"date-time":"2026-01-25T00:59:26Z","timestamp":1769302766436,"version":"3.49.0"},"reference-count":18,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2020,11,10]],"date-time":"2020-11-10T00:00:00Z","timestamp":1604966400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"NSERC Discovery Grant","award":["7RGPIN-2020-06302"],"award-info":[{"award-number":["7RGPIN-2020-06302"]}]},{"name":"Canada Research Chair Program (CRC in Fiber Optics and Photonics)","award":["950-231352"],"award-info":[{"award-number":["950-231352"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The distributed high temperature measurement of an optical fiber subjected to electric arc discharges based on optical frequency-domain reflectometry is experimentally demonstrated. The distributed temperature profile is attained in an open glow regime of a few milliamps with maximum detectable temperature up to 2100 \u00b1 20 \u00b0C. The discharge arc-induced softened length of the fiber and mechanical stress are measured and statistically analyzed in terms of the correlation of the Rayleigh spectra. The large wavelength scanning range of OFDR enables much higher accuracy for the delay time measurement with a minimum measured delay of 40 fs. The delay shift over the entire heating range for a single discharge duration is statistically calculated by using a temporal correlation method. The reliability of the thermal sensitivity coefficient as 10 pm\/\u00b0C for telecom single mode fiber (SMF, @1550 nm) is quantitatively analyzed and evaluated by the correlation coefficient. Lastly, a spectral mapping method is employed in spectrum monitoring for discharge dynamic impact on the optical path length (OPL) and local Rayleigh scatter.<\/jats:p>","DOI":"10.3390\/s20226407","type":"journal-article","created":{"date-parts":[[2020,11,10]],"date-time":"2020-11-10T14:10:41Z","timestamp":1605017441000},"page":"6407","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Distributed High Temperature Monitoring of SMF under Electrical Arc Discharges Based on OFDR"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2325-1198","authenticated-orcid":false,"given":"Chen","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Physics, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5, Canada"}]},{"given":"Song","family":"Gao","sequence":"additional","affiliation":[{"name":"Department of Physics, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5, Canada"}]},{"given":"Liang","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Physics, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5, Canada"}]},{"given":"Xiaoyi","family":"Bao","sequence":"additional","affiliation":[{"name":"Department of Physics, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,10]]},"reference":[{"key":"ref_1","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_2","doi-asserted-by":"crossref","unstructured":"Ding, Z., Wang, C., Liu, K., Jiang, J., Yang, D., Pan, G., Pu, Z., and Liu, T. (2018). Distributed Optical FiberSensors Based on Optical Frequency Domain Reflectometry. Sensors, 18.","DOI":"10.3390\/s18041072"},{"key":"ref_3","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_4","doi-asserted-by":"crossref","first-page":"614","DOI":"10.1109\/JQE.1978.1069843","article-title":"Fusion splices for single-mode optical fibers","volume":"14","author":"Hatakeyama","year":"1978","journal-title":"IEEE J. Quantum Electron."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1049\/ip-opt:19952294","article-title":"Electric arc temperature estimation of a fibre splicer","volume":"142","author":"Mohanna","year":"1995","journal-title":"IEE Proc. Optoelectron."},{"key":"ref_6","unstructured":"Gasper, M.R., Paulo, V.S.M., Henrique, M.S., and Jose Luis, S. (2004). Measurement of the Temperature of an Optical Fiber Submitted to an Electric arc Discharge, Proc. SPIE."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2111","DOI":"10.1109\/LPT.2004.831559","article-title":"In situ temperature measurement of an optical fiber submitted to electric arc discharges","volume":"16","author":"Rego","year":"2004","journal-title":"IEEE Photonics Technol. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Bansal, N.P., and Doremus, R.H. (1986). Chapter 9-Viscosity. Handbook of Glass Properties, Academic Press.","DOI":"10.1016\/B978-0-08-052376-7.50012-6"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1377","DOI":"10.1109\/50.254098","article-title":"Coherent frequency-domain reflectometry for characterization of single-mode integrated-optical waveguides","volume":"11","author":"Glombitza","year":"1993","journal-title":"J. Lightwave Technol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"666","DOI":"10.1364\/OPEX.13.000666","article-title":"High resolution optical frequency domain reflectometry for characterization of components and assemblies","volume":"13","author":"Soller","year":"2005","journal-title":"Opt. Express"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/JPHOT.2014.2320742","article-title":"Long-Range High Spatial Resolution Distributed Temperature and Strain Sensing Based on Optical Frequency-Domain Reflectometry","volume":"6","author":"Song","year":"2014","journal-title":"IEEE Photonics J."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"35823","DOI":"10.1364\/OE.27.035823","article-title":"0.5 mm spatial resolution distributed fiber temperature and strain sensor with position-deviation compensation based on OFDR","volume":"27","author":"Luo","year":"2019","journal-title":"Opt. Express"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"599","DOI":"10.1049\/el:19840413","article-title":"Stress transformation due to fusion splicing in optical fibre","volume":"20","author":"Chu","year":"1984","journal-title":"Electron. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"837","DOI":"10.1109\/JLT.1986.1074808","article-title":"Splice loss of single-mode fiber as related to fusion time, temperature, and index profile alteration","volume":"4","author":"Krause","year":"1986","journal-title":"J. Lightwave Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"3721","DOI":"10.1109\/JLT.2019.2918379","article-title":"Performance Investigation of OFDR Sensing System With a Wide Strain Measurement Range","volume":"37","author":"Zhao","year":"2019","journal-title":"J. Lightwave Technol."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Froggatt, M., Gifford, D., and Bos, J. (2011). Unaltered Optical Fiber as an Absolute Wavelength Reference for OFDR Systems. Optical Fiber Communication Conference\/National Fiber Optic Engineers Conference 2011, Optical Society of America. 2011\/03\/06.","DOI":"10.1364\/OFC.2011.OTuL4"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"136","DOI":"10.1364\/AO.21.000136","article-title":"Ultraviolet absorption studies of germanium silicate glasses","volume":"21","author":"Yuen","year":"1982","journal-title":"Appl. Opt."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Yablon, A.D. (2005). Introduction. 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