Open AccessPulse width dependence of Brillouin frequency in single mode optical fibers
Author(s) -
Seok-Beom Cho,
Young-Gyu Kim,
Jeong Wook Heo,
Jung Ju Lee
Publication year - 2005
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.13.009472
Subject(s) - brillouin scattering , brillouin zone , optics , laser linewidth , materials science , pulse (music) , optical fiber , scattering , physics , laser , detector
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. This paper presents the experimental analysis of the characteristics of Brillouin gain spectrum (BGS) influenced by the width of launched pulse. Brillouin strain coefficient is also examined for the different pulse widths, which is important to apply a Brillouin scattering-based sensor to a structural health monitoring. Experimental results showed that not only the Brillouin linewidth and gain but also the Brillouin frequency were dependent on the pulse widths.