Accurate Modeling of the Intrinsic Brillouin Linewidth via Finite-Element Analysis

被引：12
|
作者：
Dragic, Peter D. [1 ]
Ward, Benjamin G. [2 ]
机构：
[1] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA
[2] USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2010年 / 22卷 / 22期
关键词：
Brillouin scattering; finite-element methods; non-linearities; optical fibers; OPTICAL-FIBERS; SILICA FIBER; GAIN;
D O I：
10.1109/LPT.2010.2081974
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present a finite-element analysis of the Brillouin gain spectrum of a highly Ge-doped azimuthally symmetric nonuniform fiber treating the heterogeneous viscosity profile in detail. Measured Stokes' frequencies and spectral widths for the acoustic modes, and the peak Brillouin gain coefficient are found to be in excellent agreement with the model. An approximate expression for the Brillouin spectral width in azimuthally symmetric, nonuniform fibers is presented and verified for estimating this quantity using simplified boundary-value models.
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页码：1698 / 1700
页数：3
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