Patent ID: 8682177

Claim:
An optical frequency control device, comprising: an optical SSB (single side band) modulator; a source of bias voltage which applies bias voltage to the optical SSB modulator; an optical light source which supplies input light to the optical SSB modulator; and a source of a modulation signal which applies modulation signals to the optical SSB modulator, wherein the source of a modulation signal comprises: an arbitrary waveform generator for generating an electrical signal which has arbitrary waveforms and carrying out frequency sweep, the sweeping time of the arbitrary waveform generator being from 0.5 microseconds to 1 millisecond; and an electrical-signal frequency multiplier for multiplying the frequency of the electrical signal generated by the arbitrary waveform generator, whereby the modulation signal to the optical SSB modulator is generated by using the electrical signal generated by the arbitrary waveform generator and multiplied by the electrical signal frequency multiplier.