Optical coherence tomography using nonlinear optics in fiber for broadband source generation

摘要

An optical coherence tomography (OCT) system of sub-10-mum resolution, with its broadband source generated through nonlinear optics processes of a femtosecond Ti:sapphire laser in a single-mode fiber, was built for biological tissue scanning. With 400 mW power coupled into the fiber, a spectral full-width-at-half-maximum (FWHM) of 46 nm, centered at 840 nm, could be obtained. The available power for sample illumination could be as high as 100 mW. This condition was used to achieve the OCT depth resolution of 8.6 mum in tissues. The OCT system was used for scanning a human gingival mucosa sample. Cavity structures were observed that were quite consistent with the results of histological examination. (C) 2002 Published by Elsevier Science B.V. [References: 13]