A high-speed, all optical coherence tomography system was designed and constructed. This tomography system employs spectral interferometry and optical Fourier transformation to reduce the number of mechanical scanning dimensions required for multidimensional profilometry. The system also employs a time gate comprising a β -barium borate crystal driven by a femtosecond laser pulse to improve measurement time. This system has 43-μm depth resolution and 150-fs temporal resolution and is capable of taking 1000 cross-sectional image frames per second.
© 2002 Optical Society of America
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(110.0110) Imaging systems : Imaging systems
(110.4500) Imaging systems : Optical coherence tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry
Y. Yasuno, Y. Sutoh, M. Nakama, S. Makita, M. Itoh, T. Yatagai, and M. Mori, "Spectral interferometric optical coherence tomography with nonlinear β-barium borate time gating," Opt. Lett. 27, 403-405 (2002)