Title :
Spatial Resolution Enhancement in Preactivated BOTDA Schemes by Numerical Processing
Author :
Minardo, Aldo ; Bernini, Romeo ; Zeni, Luigi
Author_Institution :
Dipt. di Ing. dell´´Inf., Seconda Univ. di Napoli, Aversa, Italy
fDate :
6/15/2012 12:00:00 AM
Abstract :
A novel processing algorithm is demonstrated for time-domain high-resolution Brillouin schemes based on acoustic field preactivation. An iterative method is employed to correct the measured data from spurious effects associated with acoustic wave transients. Based on a model of the stimulated Brillouin scattering in the frequency domain, the spatial resolution degrading features are computed and subtracted from the acquired data. Experimental tests with 20-cm spatial resolution and dark-pulse pumping are reported.
Keywords :
acoustic field; acoustic waves; frequency-domain analysis; iterative methods; optical pumping; optical sensors; optical testing; stimulated Brillouin scattering; time-domain analysis; Brillouin optical time-domain analysis; acoustic field preactivation; acoustic wave transients; dark-pulse pumping; frequency domain; iterative method; numerical processing; preactivated BOTDA schemes; spatial resolution degradation; spatial resolution enhancement; spurious effects; stimulated Brillouin scattering; time-domain high-resolution Brillouin schemes; Acoustic waves; Optical fiber sensors; Optical fiber testing; Optimized production technology; Scattering; Spatial resolution; Brillouin scattering; distributed sensor; fiber-optic sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2192424
