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Optical Engineering

Dynamic full-range Fourier-domain optical coherence tomography using sinusoidal phase-modulating interferometry
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Paper Abstract

We propose a technique for dynamic full-range Fourier-domain optical coherence tomography by using sinusoidal phase-modulating interferometry, where both the full-range structural information and depth-resolved dynamic information are obtained. A novel frequency-domain filtering algorithm is proposed to reconstruct a time-dependent complex spectral interferogram from the sinusoidally phase-modulated interferogram detected with a high-rate CCD camera. By taking the amplitude and phase of the inverse Fourier transform of the complex spectral interferogram, a time-dependent full-range cross-sectional image and depth-resolved displacement are obtained. Displacement of a sinusoidally vibrating glass cover slip behind a fixed glass cover slip is measured with subwavelength sensitivity to demonstrate the depth-resolved dynamic imaging capability of our system.

Paper Details

Date Published: 1 October 2007
PDF: 4 pages
Opt. Eng. 46(10) 105603 doi: 10.1117/1.2798540
Published in: Optical Engineering Volume 46, Issue 10
Show Author Affiliations
Peng Bu, Shanghai Institute of Optics and Fine Mechanics (China)
Xiangzhao Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Osami Sasaki, Niigata Univ. (Japan)

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