A technique named synthesized optical coherence tomography (SOCT) has been proposed and developed as an alternative method to the well-known optical coherence tomography for cross-sectional imaging of scattering objects. SOCT is based on the principle of synthesis of an optical coherence function by use of a tunable laser diode. With stepwise frequency modulation of light and synchronous phase modulation, the coherence function is synthesized into a peak at an arbitrary location. The longitudinal scattering distribution of the object under test is thus obtained without a mechanically driven reference. Two-dimensional tomography was demonstrated in a basic experiment with a lateral mechanical scan.
© 1999 Optical Society of America
(060.5060) Fiber optics and optical communications : Phase modulation
(110.4500) Imaging systems : Optical coherence tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(140.3600) Lasers and laser optics : Lasers, tunable
Zuyuan He and Kazuo Hotate, "Synthesized optical coherence tomography for imaging of scattering objects by use of a stepwise frequency-modulated tunable laser diode," Opt. Lett. 24, 1502-1504 (1999)