TY - CONF A1 - Nöther, N. A1 - Gili, O. A1 - Liehr, Sascha A1 - Lenke, P. ED - Ilki, A. ED - Motavalli, M. ED - Goksu, C. ED - Havranek, B. T1 - Frequency domain-based distributed and dynamic optical fiber sensing in geotechnical and industrial monitoring T2 - SMAR 2013 - 2nd Conference on smart monitoring, assessment and rehabilitation of civil structures (Proceedings) N2 - This article reports on recent advancements in the field of distributed optical fiber sensing with a focus on the monitoring of geotechnical structures and buildings. While the classical time-domain approach to distributed sensing is widely known, this article provides an introduction into the frequency-domain analysis technique for both distributed Brillouin measurements (as commonly used for strain and temperature monitoring) and for linear backscattering measurements. The article also addresses an issue which arises when truly distributed measurements are compared among each other; a new approach to calculate differential curves from a measurement and a base-line which avoids misleading large amplitudes at physical events with strong gradients is proposed. Finally, a field test of a new read-out technology, the OFDR (optical frequency domain reflectometry) technique providing dynamic readings of length changes between discrete fiber positions, is presented. T2 - SMAR 2013 - 2nd Conference on smart monitoring, assessment and rehabilitation of civil structures CY - Istanbul, Turkey DA - 09.09.2013 PY - 2013 SN - 978-3-033-04055-7 SP - 1 EP - 8 CY - Istanbul, Turkey AN - OPUS4-30122 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -