Real-time quadrature projection complex conjugate resolved Fourier domain optical coherence tomography

Abstract

We present a novel algorithm for full-range imaging by suppression of the complex conjugate artifact in phase-shifting Fourier domain optical coherence tomography. This technique utilizes the projection of multiple phase-shifted interferograms onto an orthogonal basis set to reconstruct the complex interferogram. Full-range imaging with $>30\mathrm{dB}$ suppression of the symmetric artifact is demonstrated using a $3\times 3$ fiber coupler swept source OCT system, providing a depth range of $6.6\mathrm{mm}$ with $-8\mathrm{dB}$ roll-off in sensitivity at the depth boundaries relative to DC. Real-time display of full-range images of the anterior segment of the human eye acquired in vivo at a line rate of $6.67\mathrm{kHz}$ are presented.

© 2006 Optical Society of America

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