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Opt Lett. 2007 Dec 1;32(23):3453-5.

Complex ambiguity-free Fourier domain optical coherence tomography through transverse scanning.

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  • 1Institute of Applied Optics, Ecole Polytechnique Federale de Lausanne, Switzerland. rainer.leitgeb@epfl.ch


We introduce a simple and cheap method for phase-shifting Fourier domain optical coherence tomography (FDOCT) that does not need additional devices and can easily be implemented. A small beam offset at the fast beam-scanning mirror introduces a causal phase shift, which can be used for B-scan-based complex image reconstruction. We derive the conditions for optimal conjugate suppression and demonstrate the method on human skin in vivo for spectrometer-based FDOCT operating at 1300 nm employing a handheld scanner.

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