A reconstruction technique for long-range stimulated Brillouin scattering distributed fibre-optic sensors: experimental results

The experimental validation of a numerical technique for temperature/strain profile reconstruction based on Brillouin optical-fibre time-domain analysis (BOTDA) sensors is presented. In this approach, we search directly for the Brillouin frequency shift profile along the fibre that matches the measured data. The algorithm is based on a harmonic expansion of the unknown profile, whose coefficients are determined by means of a multidimensional minimization. Experimental measurements have been carried out in order to reveal the influence of nonlocalities in Brillouin measurements, and to prove the capability of the proposed algorithm to compensate for these effects.

[1]  T. Horiguchi,et al.  Optical-fiber-attenuation investigation using stimulated Brillouin scattering between a pulse and a continuous wave. , 1989, Optics letters.

[2]  Govind P. Agrawal,et al.  Nonlinear Fiber Optics , 1989 .

[3]  T. Horiguchi,et al.  BOTDA-nondestructive measurement of single-mode optical fiber attenuation characteristics using Brillouin interaction: theory , 1989 .

[4]  A. Chraplyvy.  Limitations on lightwave communications imposed by optical-fiber nonlinearities , 1990 .

[5]  R. Yamauchi,et al.  Novel method using white spectral probe signals to measure Brillouin gain spectra of pure silica core fibres , 1992 .

[6]  M. V. Deventer,et al.  Polarization properties of stimulated Brillouin scattering in single-mode fibers , 1994 .

[7]  Nicol A. Heron,et al.  Experimental and theoretical studies on a distributed temperature sensor based on Brillouin scattering , 1995 .

[8]  K. Shimizu,et al.  Development of a distributed sensing technique using Brillouin scattering , 1995 .

[9]  D. Garcus,et al.  Brillouin optical-fiber frequency-domain analysis for distributed temperature and strain measurements , 1997 .

[10]  L. Thévenaz,et al.  Brillouin gain spectrum characterization in single-mode optical fibers , 1997 .

[11]  Romeo Bernini,et al.  Reconstruction of doping profiles in semiconductor materials using optical tomography , 1999 .

[12]  U. Röpke,et al.  The influence of pulse amplification on distributed fibre-optic Brillouin sensing and a method to compensate for systematic errors , 1999 .

[13]  Xiaoyi Bao,et al.  Signal processing for a high-spatial-resolution distributed sensor , 2000 .

[14]  Romeo Bernini,et al.  Reconstruction technique for stimulated Brillouin scattering distributed fiber-optic sensors , 2002 .