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Applied Optics

Applied Optics


  • Vol. 44, Iss. 25 — Sep. 1, 2005
  • pp: 5206–5214

Frequency-estimation-based signal-processing algorithm for white-light optical fiber Fabry–Perot interferometers

Fabin Shen and Anbo Wang  »View Author Affiliations

Applied Optics, Vol. 44, Issue 25, pp. 5206-5214 (2005)

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A novel signal-processing algorithm based on frequency estimation of the spectrogram of single-mode optical fiber Fabry–Perot interferometric sensors under white-light illumination is described. The frequency-estimation approach is based on linear regression of the instantaneous phase of an analytical signal, which can be obtained by preprocessing the original spectrogram with a bandpass filter. This method can be used for a relatively large cavity length without the need for spectrogram normalization to the spectrum of the light source and can be extended directly to a multiplexed sensor system. Experimental results show that the method can yield both absolute measurement with high resolution and a large dynamic range. Performance analysis shows that the method is tolerant of background noise and variations of the source spectrum.

© 2005 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry

Original Manuscript: February 15, 2005
Revised Manuscript: April 7, 2005
Manuscript Accepted: April 8, 2005
Published: September 1, 2005

Fabin Shen and Anbo Wang, "Frequency-estimation-based signal-processing algorithm for white-light optical fiber Fabry–Perot interferometers," Appl. Opt. 44, 5206-5214 (2005)

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