An orthogonal dispersive spectral-domain optical coherence tomography (SDOCT) system based on a spectrometer consisting of a high spectral resolution virtually-imaged phased array (VIPA) and a low resolution diffraction grating is developed. Two-dimensional (2D) dispersion generated by the combination of the VIPA and the grating in conjunction with a 2D CCD leads to an improved performance of the spectrometer. Ultrahigh spectral resolution of 0.002 nm within a free spectrum range of 50 nm is realized, providing the spectrometer with a spectral sampling rate up to . The developed SDOCT realizes an imaging depth over 80 mm, which is the longest depth range ever achieved by SDOCT. The increased spectral sampling rate also results in a high signal-to-noise ratio of the SDOCT system. The application of the developed system is further illustrated by quantitative phase imaging of a glass plate and an optical lens.
© 2012 Optical Society of AmericaFull Article | PDF Article
I. Zeylikovich, A. Gilerson, and R. R. Alfano
Opt. Lett. 23(23) 1797-1799 (1998)
Adrian Podoleanu and Daniel Woods
Opt. Lett. 32(16) 2300-2302 (2007)
Branislav Grajciar, Michael Pircher, Christoph K. Hitzenberger, Oliver Findl, and Adolf F. Fercher
Opt. Express 16(4) 2405-2414 (2008)