We have developed a novel real-time phase-resolved functional optical coherence tomography system that uses optical Hilbert transformation. When we use a resonant scanner in the reference arm of the interferometer, with an axial scanning speed of 4 kHz, the frame rate of both structural and Doppler blood-flow imaging with a size of 100 by 100 pixels is 10 Hz. The system has high sensitivity and a larger dynamic range for measuring the Doppler frequency shift that is due to moving red blood cells. Real-time images of <i>in vivo</i> blood flow in human skin obtained with this interferometer are presented.
© 2002 Optical Society of America
Yonghua Zhao, Zhongping Chen, Zhihua Ding, Hongwu Ren, and J. Stuart Nelson, "Real-time phase-resolved functional optical coherence tomography by use of optical Hilbert transformation," Opt. Lett. 27, 98-100 (2002)