• ISSN 0258-2724
  • CN 51-1277/U
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LI Cheng-hui, YUJin-jiang, QIUWen-ge. Analysis on Dynamic Loads on Ballast of Shenzhen Subway[J]. Journal of Southwest Jiaotong University, 2001, 14(2): 169-171.
Citation: XIAO Shanghui, LI Li. Analytical Model of Brillouin Scattering Spectrum Measurements in Fibre-Optic Distributed Sensing Systems[J]. Journal of Southwest Jiaotong University, 2009, 22(6): 946-950.

Analytical Model of Brillouin Scattering Spectrum Measurements in Fibre-Optic Distributed Sensing Systems

  • Received Date: 07 Oct 2008
  • Publish Date: 20 Jan 2010
  • Under the condition that the pulse widths are near or below the photon lifetime,i.e.10 ns,scattering spectrum properties of fibre-optic distributed sensing systems were analyzed and discussed.A nonlinear Pseudo-Voigt(P-V) analytical model was established by optimal combination of Lorentzian and Gaussian profiles for Brillouin scattering spectrum in fiber-optic distributed sensing systems.The P-V model and the Levenberg-Marquardt(L-M) nonlinear least square algorithm were applied to curve fitting and optimal parameter estimation of measured data of Brillouin scattering spectrum.Better fitting and higher resolution for parameter estimation were obtained with the proposed method compared to the conventional Lorentzian and Gaussian profiles.

     

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