We present a fiber-based, low-coherence interferometer that significantly reduces phase noise by incorporating a second, narrowband, continuous-wave light source as a phase reference. By incorporating this interferometer into a Doppler OCT system, we demonstrate significant velocity noise reduction in reflective and scattering samples using processing techniques amenable to real-time implementation. We also demonstrate 90% suppression of velocity noise in a flow phantom.
© 2005 Optical Society of America
(170.3340) Medical optics and biotechnology : Laser Doppler velocimetry
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4500) Medical optics and biotechnology : Optical coherence tomography
Cameron J. Pedersen, Siavash Yazdanfar, Volker Westphal, and Andrew M. Rollins, "Phase-referenced Doppler optical coherence tomography in scattering media," Opt. Lett. 30, 2125-2127 (2005)