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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 36, Iss. 21 — Nov. 1, 2011
  • pp: 4275–4277

Accurate estimation of Brillouin frequency shift in Brillouin optical time domain analysis sensors using cross correlation

Mohsen Amiri Farahani, Eduardo Castillo-Guerra, and Bruce G. Colpitts  »View Author Affiliations


Optics Letters, Vol. 36, Issue 21, pp. 4275-4277 (2011)
http://dx.doi.org/10.1364/OL.36.004275


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Abstract

Current methods of estimating the Brillouin frequency shift in Brillouin optical time domain analysis sensors are based on curve-fitting techniques. These techniques apply the same weight to all portions of the curve and dutifully fit into the peak and noisy ends of the curve. This makes them very sensitive to noise, initialization of fitting param eters, symmetry, and start and stop frequencies. We introduce a method based on the cross-correlation technique to estimate the central frequency of noisy Lorentzian curves, which is more robust to noise and free from initial settings of fitting parameters.

© 2011 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(290.5830) Scattering : Scattering, Brillouin
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 26, 2011
Revised Manuscript: September 19, 2011
Manuscript Accepted: September 26, 2011
Published: October 31, 2011

Citation
Mohsen Amiri Farahani, Eduardo Castillo-Guerra, and Bruce G. Colpitts, "Accurate estimation of Brillouin frequency shift in Brillouin optical time domain analysis sensors using cross correlation," Opt. Lett. 36, 4275-4277 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-21-4275

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