Open AccessStrain event detection using a double-pulse technique of a Brillouin scattering-based distributed optical fiber sensor
Author(s) -
Seok-Beom Cho,
Jung Ju Lee,
IlBum Kwon
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.004339
Subject(s) - brillouin scattering , optics , brillouin zone , materials science , distributed acoustic sensing , optical fiber , fiber optic sensor , image resolution , scattering , signal (programming language) , pulse (music) , light scattering , physics , detector , computer science , programming language
Stimulated Brillouin scattering in optical fibers can be used to measure strain or temperature in a distributed manner. Brillouin optical time domain analysis (BOTDA) is the most common sensor system based on the Brillouin scattering. To improve the spatial resolution of these measurements, shorter pulses must be used, resulting in reduced signal powers causing a decrease of the dynamic range. In this paper, a doublepulse technique was proposed to enhance the spatial resolution of BOTDA. Experimental results showed that the ability to resolve two adjacent events could be enhanced, about twice, by using a double-pulsed pump light without decreases in the dynamic range.