WAVELENGTH-SWEPT LASER AND METHOD FOR ITS OPERATION

摘要

PURPOSE: A wavelength shift laser light source is provided to be capable of obtaining short laser optical pulses without an expensive or modulator using additional saturation absorption substance. CONSTITUTION: A wavelength shift laser light source includes a resonant. The resonant includes a gain medium(120) for amplifying light in a wide range of wavelength band, a wavelength variable filter(130) having the minimum loss center wavelength region and a non-linear medium(140) having different characteristics depending on the intensity of light. An optical pumping means inverses the density of the gain medium(120). A filer modulation signal generator changes the minimum loss center wavelength region of the wavelength variable filter, continuously in time.