Frequency shifting optical swept lightsource system and optical coherence tomography apparatus to which the system is applied

摘要

A frequency shifting optical swept light source system is provided, e.g. for medical applications. The system includes a light source 30 that emits light; an amplifier 50 that amplifies the light output from the light source; an optical converter 71 that shifts a frequency of the amplified light and compresses a spectrum of the amplified light; and a controller 10 that controls a current signal applied to the light source such that a repetition rate of the light output from the light source is adjusted, so that an intensity of the amplified light is adjusted, to thereby adjust a position of the compressed spectrum with respect to a predetermined frequency band.