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  • Title: A rapid, dispersion-based wavelength-stepped and wavelength-swept laser for optical coherence tomography.
    Author: Tozburun S, Siddiqui M, Vakoc BJ.
    Journal: Opt Express; 2014 Feb 10; 22(3):3414-24. PubMed ID: 24663631.
    Abstract:
    Optical-domain subsampling enables Fourier-domain OCT imaging at high-speeds and extended depth ranges while limiting the required acquisition bandwidth. To perform optical-domain subsampling, a wavelength-stepped rather than a wavelength-swept source is required. This preliminary study introduces a novel design for a rapid wavelength-stepped laser source that uses dispersive fibers in combination with a fast lithium-niobate modulator to achieve wavelength selection. A laser with 200 GHz wavelength-stepping and a sweep rate of 9 MHz over a 94 nm range at a center wavelength of 1550 nm is demonstrated. A reconfiguration of this source design to a continuous wavelength-swept light for conventional Fourier-domain OCT is also demonstrated.
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