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

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DOIResolve DOI: http://doi.org/10.1364/OE.18.010446
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TypeArticle
Journal titleOptics Express
Volume18
Issue10
Pages1044610461; # of pages: 16
SubjectOptical coherence tomography; Nonlinear optical signal processing
AbstractWe 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.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number16891216
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Record identifierf93f6264-749e-4ed1-bd79-831db7fbfe9e
Record created2011-02-20
Record modified2016-05-09
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