RT info:eu-repo/semantics/preprint
T1 Steady-sensitivity distributed acoustic sensors
A1 Fernández Ruiz, María del Rosario
A1 Fidalgo Martins, Hugo
A1 Pereira da Costa, Luis Duarte
A1 Martín López, Sonia
A1 González Herráez, Miguel
K1 Chirp modulation
K1 Optical time domain reflectometry
K1 Phase noise
K1 Rayleigh scattering
K1 Remote sensing
K1 Electrónica
K1 Electronics
AB Distributed acoustic sensors (DAS) based on phase-sensitive optical time-domain reflectometry (phiOTDR) have demonstrated interesting performance for many applications ranging from seismology to pipeline protection. However, the sensitivity of traditional DAS relying on coherent detection is strongly dependent on the system noise and trace fading points, offering poor reliability of the results in the spatial dimension. In this manuscript, we evaluate the statistical performance of a recently proposed DAS technique, namely, chirped-pulse phiOTDR, in terms of sensitivity and signal-to-noise ratio (SNR). Our results show behavioral trends that significantly differ from those of traditional DAS. In particular, the acoustic SNR distribution in chirped-pulse DAS is notably narrower than that in the traditional case, allowing to ensure a large system dynamic range across all the points of the optical trace. Hence, chirped-pulse phiOTDR offers localized perturbation detection with very high reliability, almost independent of trace fading points, along the complete reachable range of the sensor.
SN 0733-8724
YR 2018
FD 2018-12-01
LK http://hdl.handle.net/10017/37812
UL http://hdl.handle.net/10017/37812
LA eng
NO European Commission
DS MINDS@UW
RD 20-abr-2024