OPTICAL SOURCE OF OPTICAL COHERENCE TOMOGRAPHY

摘要

An optical source of an optical coherence tomography is provided to improve depth direction resolution in the optical coherence tomography by widening a wavelength variable region and a full width half maximum and have a rapid image obtaining speed through a rapid wavelength conversion speed by using a galvanometer. A semiconductor optical amplifier(300) generates broadband light. A polarizing controller(310) controls polarization of the light by receiving the broadband light from the semiconductor optical amplifier. A single mode optical fiber distributor(320) distributes a ratio of light amount in a diffraction grating direction and an output stage direction by receiving the polarization-controlled light from the polarizing controller. A first optical fiber-collimator(330) impinges the light distributed by the single mode optical fiber distributor as uniform parallel light to a diffraction grating. The diffraction grating(340) diffracts the light impinged from the first optical fiber-collimator. A galvanometer coupled mirror(350) reflects first diffraction light, impinged by being diffracted from the diffraction grating, to the diffraction grating. A second optical fiber-collimator(360) impinges the light distributed by the single mode optical fiber distributor to the output stage as uniform-size parallel light. Optical fibers(370) are passages to transmit the light by being positioned between broadband wavelength conversion light source devices.