RT info:eu-repo/semantics/conferenceObject
T1 Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km
A1 Fidalgo Martins, Hugo
A1 Martín López, Sonia
A1 Filograno, M. L.
A1 Corredera, Pedro
A1 Frazão, O.
A1 González Herráez, Miguel
K1 Distributed sensor
K1 Optical fiber sensors
K1 Phase-sensitive OTDR
K1 Vibration sensor
K1 Raman scattering
K1 Ciencias tecnológicas
K1 Electrónica
K1 Technology
K1 Electronics
AB We report on the use of second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer( φOTDR ) used for vibration measurements over very long distances. The sensor was able to measure vibrations of up to380 Hz (limit set by the time of flight of light pulses) in a distance of 125 km with a resolution of 10 m and no postprocessing.Balanced detection is used to reduce the relative intensity noise. A comparison with a sensor using first-orderRaman amplification under similar conditions is presented and a clear improvement of performance is demonstrated.
PB Society of Photo Optical  Instrumentation Engineers
SN 978-1-62841-175-1
SN 0277-786X
YR 2014
FD 2014-06-02
LK http://hdl.handle.net/10017/26477
UL http://hdl.handle.net/10017/26477
LA eng
NO Ministerio de Economía y Competitividad
DS MINDS@UW
RD 04-oct-2023