Accurate modeling of the intrinsic Brillouin linewidth via finite-element analysis

Peter D. Dragic, Benjamin G. Ward

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Article number5590281
Pages (from-to)1698-1700
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number22
StatePublished - 2010


  • Brillouin scattering
  • finite-element methods
  • nonlinearities
  • optical fibers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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