Abstract
Optical coherence tomography, which we call as OCT, is non-destructive imaging technique of inside structure of biological tissue with um resolution, using broadband light source and optical interferometer. Thanks to the advance of related technologies and improvement of imaging speed, OCT have been used in several medical fields, especially ophthalmology. We have been investigating ultrahigh resolution OCT using broadband supercontinuum pumped by ultrashort pulses. The performance of OCT imaging depends on the optical wavelength range. The wavelength range of 0.8 μm is suitable for high resolution OCT imaging. Recently, since the magnitude of scattering coefficient is low and there is local minimum of water absorption, the wavelength range of 1.7 μm absorbs a lot of attentions in terms of the large penetration imaging. In this article, based on the author's works, the high resolution OCT technologies will be reviewed from the fundamental to the recent results.
