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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 10 — May. 10, 2010
  • pp: 10446–10461

Experimental validation of an optimized signal processing method to handle non-linearity in swept-source optical coherence tomography

Sébastien Vergnole, Daniel Lévesque, and Guy Lamouche  »View Author Affiliations

Optics Express, Vol. 18, Issue 10, pp. 10446-10461 (2010)

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We evaluate various signal processing methods to handle the non-linearity in wavenumber space exhibited by most laser sources for swept-source optical coherence tomography. The following methods are compared for the same set of experimental data: non-uniform discrete Fourier transforms with Vandermonde matrix or with Lomb periodogram, resampling with linear interpolation or spline interpolation prior to fast-Fourier transform (FFT), and resampling with convolution prior to FFT. By selecting an optimized Kaiser-Bessel window to perform the convolution, we show that convolution followed by FFT is the most efficient method. It allows small fractional oversampling factor between 1 and 2, thus a minimal computational time, while retaining an excellent image quality.

© 2010 OSA

OCIS Codes
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Fourier Optics and Signal Processing

Original Manuscript: February 1, 2010
Manuscript Accepted: April 18, 2010
Published: May 5, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics

Sébastien Vergnole, Daniel Lévesque, and Guy Lamouche, "Experimental validation of an optimized signal processing method to handle non-linearity in swept-source optical coherence tomography," Opt. Express 18, 10446-10461 (2010)

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