Open AccessReal-time phase-resolved optical coherence tomography and optical Doppler tomography
Author(s) -
Zhihua Ding,
Yonghua Zhao,
Haoran Ren,
J. Stuart Nelson,
Zhongping Chen
Publication year - 2002
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.10.000236
Subject(s) - optical coherence tomography , optics , interferometry , tomography , optical tomography , doppler effect , physics , laser doppler velocimetry , scanner , phase (matter) , materials science , blood flow , medicine , quantum mechanics , astronomy
We have developed a novel real-time phase-resolved optical coherence tomography (OCT) and optical Doppler tomography (ODT) system using optical Hilbert transformation. By combining circularly polarized reference and linearly polarized sample signals, in-phase and quadrature interference components are produced in separate channels and treated as the real and imaginary parts of a complex signal to obtain the phase information directly. Using a resonant scanner at an axial scanning speed of 4 kHz in the reference arm of the interferometer, both structure and blood flow velocity images with 200 axial scans can be acquired at 20 frames per second with high sensitivity and large dynamic range. Real-time videos of in vivo blood flow in the chick chorioallantoic membrane using this interferometer are presented.