Open AccessHow to obtain high spectral resolution of SBS-based distributed sensing by using nanosecond pulses
Author(s) -
V. P. Kalosha,
E. A. Ponomarev,
Liang Chen,
Xiaoyi Bao
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.002071
Subject(s) - brillouin scattering , optics , laser linewidth , nanosecond , brillouin zone , materials science , image resolution , resolution (logic) , spectral resolution , pulse (music) , scattering , optical fiber , physics , laser , spectral line , detector , astronomy , artificial intelligence , computer science
The ultimate spectral and spatial resolutions of distributed sensing based on stimulated Brillouin scattering (SBS) in optical fibers is shown for several-nanosecond Stokes pulses. Precise measurements of the local Brillouin frequency, with a spectral resolution close to the natural linewidth and, simultaneously, the spatial resolution of the pulse length are provided by AC detection of the output pump in the case of a finite cw component (base) of the Stokes pulse. Simulation examples of SBS-based sensing for fibers containing sections with different Brillouin frequencies are presented, demonstrating the high resolution of the sensing.