RT info:eu-repo/semantics/conferenceObject T1 Chirped-pulse phase-sensitive reflectometry: hearing behind the walls with high fidelity A1 González Herráez, Miguel A1 Pastor Graells, Juan A1 García Ruiz, Andrés A1 Fernández Ruiz, María del Rosario A1 Fidalgo Martins, Hugo A1 Martín López, Sonia K1 Distributed fiber-optic sensor K1 Phase-sensitive reflectometry K1 Distributed acoustic sensor K1 Temperature sensor K1 Strain sensor K1 Electrónica K1 Electronics AB We review our recent work on chirped-pulse phase-sensitive optical time-domain reflectometry along optical fibers and its application in the measurement of true nanostrain variations in the kHz frequency range over km-long fibers. We also show how this technique can be used to perform distributed photothermal measurements of gas presence in suitable microstructured fibers. PB SPIE SN 978-1-51061-091-0 YR 2017 FD 2017-04-24 LK http://hdl.handle.net/10017/29450 UL http://hdl.handle.net/10017/29450 LA eng NO 25th International conference on Optical Fiber Sensors, , 24/04/2017-28/04/2017, Jeju, Corea del Sur. NO European Commission DS MINDS@UW RD 02-may-2024