{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:37:17Z","timestamp":1760240237949,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2019,4,16]],"date-time":"2019-04-16T00:00:00Z","timestamp":1555372800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Interior","award":["VI20152020045"],"award-info":[{"award-number":["VI20152020045"]}]},{"name":"E-infrastructure CESNET -- modernisation","award":["CZ.02.1.01\/0.0\/0.0\/16 013\/0001797"],"award-info":[{"award-number":["CZ.02.1.01\/0.0\/0.0\/16 013\/0001797"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Fibre optic infrastructures are very important, and therefore, it is necessary to protect them from fibre cuts. Most fibre cuts are caused by digging activity, and many network operators seek appropriate solutions enabling detection of possible unexpected events (predict these cuts) and subsequent network outages. In most cases, there is no need to locate events, and only information regarding the occurrence of the event is sufficient. Direct detection-based distributed fibre optic sensing systems appear to be an appropriate solution, allowing digging to be detected before the fibre breaks. The average power of such signals is relatively small, and there is no interference with other signals in the fibre. We performed laboratory measurements to compare the sensitivity and accuracy of interferometric and polarization systems for acoustic vibrations. In the case of interferometric systems, the reference and sensing arms were in the same cable, and both were subjected to acoustic vibrations.<\/jats:p>","DOI":"10.3390\/s19081810","type":"journal-article","created":{"date-parts":[[2019,4,17]],"date-time":"2019-04-17T03:02:01Z","timestamp":1555470121000},"page":"1810","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Distributed Sensing Based on Interferometry and Polarization Methods for Use in Fibre Infrastructure Protection"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4651-8353","authenticated-orcid":false,"given":"Petr","family":"Munster","sequence":"first","affiliation":[{"name":"Department of Telecommunication, Brno University of Technology, Technicka 12, 616 00 Brno, Czech Republic"},{"name":"Department of Optical Networks, CESNET a.l.e., Zikova 4, 160 00 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8659-8645","authenticated-orcid":false,"given":"Tomas","family":"Horvath","sequence":"additional","affiliation":[{"name":"Department of Telecommunication, Brno University of Technology, Technicka 12, 616 00 Brno, Czech Republic"},{"name":"Department of Optical Networks, CESNET a.l.e., Zikova 4, 160 00 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7141-2382","authenticated-orcid":false,"given":"Josef","family":"Vojtech","sequence":"additional","affiliation":[{"name":"Department of Optical Networks, CESNET a.l.e., Zikova 4, 160 00 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,4,16]]},"reference":[{"key":"ref_1","first-page":"177","article-title":"Research Challenges in Optical Communications Towards 2020 and Beyond","volume":"44","author":"Batagelj","year":"2014","journal-title":"Informacije MIDEM"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Simsarian, J.E., and Winzer, P. (2017). Shake Before Break: Per-Span Fiber Sensing with In-Line Polarization Monitoring. Optical Fiber Communication Conference, OSA.","DOI":"10.1364\/OFC.2017.M2E.6"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1080\/01468030.2017.1327624","article-title":"Interference of Data Transmission in Access and Backbone Networks by High-Power Sensor System","volume":"36","author":"Munster","year":"2017","journal-title":"Fiber Integr. Opt."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Budinski, V., and Donlagic, D. (2017). Fiber-Optic Sensors for Measurements of Torsion, Twist and Rotation: A Review. Sensors, 17.","DOI":"10.3390\/s17030443"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Gli\u0161i\u0107, B., Posenato, D., and Inaudi, D. (2007). Integrity monitoring of old steel bridge using fiber optic distributed sensors based on Brillouin scattering. 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Available online: https:\/\/www.thorlabs.com\/."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/8\/1810\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:45:45Z","timestamp":1760186745000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/8\/1810"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,4,16]]},"references-count":16,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2019,4]]}},"alternative-id":["s19081810"],"URL":"https:\/\/doi.org\/10.3390\/s19081810","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2019,4,16]]}}}