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  • Title: Simultaneous dual-band ultra-high resolution optical coherence tomography.
    Author: Spöler F, Kray S, Grychtol P, Hermes B, Bornemann J, Först M, Kurz H.
    Journal: Opt Express; 2007 Aug 20; 15(17):10832-41. PubMed ID: 19547440.
    Abstract:
    Ultra-high resolution optical coherence tomography (OCT) imaging is demonstrated simultaneously at 840 nm and 1230 nm central wavelength using an off-the-shelf turn-key supercontinuum light source. Spectral filtering of the light source emission results in a double peak spectrum with average powers exceeding 100 mW and bandwidths exceeding 200 nm for each wavelength band. A free-space OCT setup optimized to support both wavelengths in parallel is introduced. OCT imaging of biological tissue ex vivo and in vivo is demonstrated with axial resolutions measured to be < 2 mum and < 4 mum at 840 nm and 1230 nm, respectively. This measuring scheme is used to extract spectroscopic features with outstanding spatial resolution enabling enhanced image contrast.
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