Open AccessWavelength dependence of the Brillouin spectral width of boron doped germanosilicate optical fibers
Author(s) -
Pi Cheng Law,
Peter D. Dragic
Publication year - 2010
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.18.018852
Subject(s) - brillouin scattering , materials science , optics , wavelength , optical fiber , brillouin zone , fiber , doping , zero dispersion wavelength , dispersion shifted fiber , optoelectronics , fiber optic sensor , composite material , physics
Boron co-doped germanosilicate fibers are investigated via the Brillouin light scattering technique using two wavelengths, 1534 nm and 1064 nm. Several fibers are investigated, including four drawn from the same preform but at different draw temperatures. The Stokes' shifts and the Brillouin spectral widths are found to increase with increasing fiber draw temperature. A frequency-squared law has adequately described the wavelength dependence of the Brillouin spectral width of conventional Ge-doped fibers. However, it is found that unlike conventional Ge-doped fibers these fibers do not follow the frequency-squared law. This is explained through a frequency-dependent dynamic viscosity that modifies this law.