We propose and demonstrate a novel detection technique, based on a modified electronic phase-locked loop, for Doppler optical coherence tomography. The technique permits real-time simultaneous reflectivity and continuous, bidirectional velocity mapping in turbid media over a wide velocity range with minimal sensitivity penalty compared with conventional optical coherence tomography, which is a major advance over current postprocessing and discrete parallel detection techniques.
© 2000 Optical Society of America
(110.4500) Imaging systems : Optical coherence tomography
(110.7050) Imaging systems : Turbid media
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(170.3340) Medical optics and biotechnology : Laser Doppler velocimetry
Andrei V. Zvyagin, Jonathan B. FitzGerald, K. K. M. B. D. Silva, and David D. Sampson, "Real-time detection technique for Doppler optical coherence tomography," Opt. Lett. 25, 1645-1647 (2000)