Glass-clad crystal fibers based ultrahigh resolution optical coherence tomography

Active crystal fibers can generate CW and near-Gaussian-shape milliwatt-level broadband emissions at 560 nm, 770 nm, and 1380 nm with 3-dB bandwidths of 98, 210, and 240 nm, respectively. They are eminently suitable for ultrahigh-resolution optical coherence tomography.