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The Acoustic Velocity of Ge‐Doped Silica Fibers: A Comparison of Two Models
Author(s) -
Dragic Peter D.
Publication year - 2010
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/j.2041-1294.2010.00025.x
Subject(s) - materials science , brillouin scattering , doping , silica fiber , range (aeronautics) , fiber , brillouin zone , optics , particle velocity , function (biology) , scattering , mineralogy , optical fiber , composite material , acoustics , physics , optoelectronics , fiber laser , geology , evolutionary biology , biology
Two models are compared with measured data for the longitudinal acoustic velocity of Ge‐doped silica fibers as a function of GeO 2 content in order to determine if either of them can be used in designing the acoustic velocity profile of an optical fiber. These are the Makishima–Mackenzie and additive (AD) models. Both models are found to fit measured data very well in the available test samples, and as a result both models offer a means to accurately design doping profiles for a number of Brillouin scattering applications. The major difference between these models lies in the slope of the curve between pure silica and pure GeO 2 acoustic velocity values, the latter of which lies outside the range of our experimental data (<40 mol% GeO 2 in silica). The AD model is also shown to fit the Sellemeier equation very well.