44967 2018 eng 1600, 1 9 5 18 article MDPI Basel, Switzerland 1 -- -- -- We demonstrate (and are the first to do so) 63 km Brillouin Optical Frequency-Domain Analysis (BOFDA) for temperature and strain monitoring using a 100 km fiber loop. The use of BOFDA for long-range applications can be considered a novel approach, as previous investigations focused on the utilization of Brillouin Optical Time-Domain Reflectometry and Analysis (BOTDR and BOTDA, respectively). At 51.7 km, a 100 m hotspot (37 °C) was detected without using distributed Raman amplification or image processing. Sensors 10.3390/s18051600 1424-8220 urn:nbn:de:kobv:b43-449679 25.05.2018 Creative Commons - CC BY - Namensnennung 4.0 International Thomas Kapa Andy Schreier Katerina Krebber eng uncontrolled Distributed sensing eng uncontrolled Stimulated Brillouin scattering eng uncontrolled Fiber optics sensors Angewandte Physik Verlagsliteratur Datei für die Öffentlichkeit verfügbar ("Open Access") Wissenschaftliche Artikel der BAM Bundesanstalt für Materialforschung und -prüfung (BAM) https://opus4.kobv.de/opus4-bam/files/44967/2018 - Kapa - 63 km BOFDA for Temperature and Strain Monitoring.pdf