Optical frequency comb generator control device

A control device of an optical frequency comb generator comprising an optical modulator for performing an optical modulation of incident light in an optical resonator, the optical frequency comb generator control device comprising:

• an optical filter for attenuating a carrier frequency component of an optical frequency comb emitted as a transmitted light or a reflected light from the optical resonator;
• a photodetector for detecting an optical intensity by receiving an optical frequency component extracted from the optical frequency comb via the optical filter;
• a resonance control unit to which a detection signal of the photodetector is supplied;
• and
• a bottom position discriminator for discriminating a bottom position of a signal level of the detection signal of the photodetector,
• wherein an optical intensity of the optical frequency comb in which the carrier frequency component is attenuated by the optical filter is detected by the photodetector, and an optical resonant length of the optical resonator or a light source frequency of the incident light is feedback controlled by the resonance control unit, and wherein the resonance control unit performs a feedback control with the bottom position of the signal level of the detection signal of the photodetector as a basis of a stabilization point, based on a discrimination output by the bottom position discriminator.