39864 2017 eng poster 0 -- -- -- We propose the optical frequency Domain reflectometry (OFDR) technique based on intensity modulation frequency sweep measurement for coherent distributed sensing applications. By evaluating interferometric Rayleigh scattering changes along the fibre, strain and temperature changes can be detected with a sensitivity in the ne-range and 10 mK temperature resolution. Low Vibration frequencies and vibrations up to the kHz-range can be detected by differential power change evaluation in the spatial domain. This OFDR approach is a low-cost alternative to distributed vibration sensing based on C-OTDR up to distances of several kilometres. EAGE/DGG Workshop on Fibre Optics Technology in Geophysics Potsdam, Germany 31.03.2017 31.03.2017 Sascha Liehr eng uncontrolled Optical fiber sensor eng uncontrolled Distributed sensing eng uncontrolled Interferometer eng uncontrolled Strain sensing eng uncontrolled Temperature sensing Ingenieurbau Datei im Netzwerk der BAM verfügbar ("Closed Access") Präsentation