Optical communication system and optical transmitter

An optical communication system, comprising:

• an optical transmitter section comprising:
• a single-side band modulation circuit configured to subject a double-side band modulated signal to transformation using single-side band modulation to generate a single-side band modulated signal;
• and
• an optical modulator configured to output an optical modulated signal based on the single-side band modulated signal generated by the single-side band modulation circuit;
• and
• an optical receiver section configured to receive the optical modulated signal output by the optical transmitter section, and to directly detect an intensity of the optical modulated signal to generate a received signal,
• wherein the optical receiver section comprises a compensation circuit configured to compensate an intensity of the received signal so that the intensity of the received signal becomes closer to an intensity of the double-side band modulated signal.

An optical transmitter, comprising:

• a single-side band modulation circuit configured to subject a double-side band modulated signal to transformation using single-side band modulation to generate a single-side band modulated signal;
• a correction circuit configured to correct an intensity of the single-side band modulated signal so that the intensity of the single-side band modulated signal becomes closer to an intensity of the double-side band modulated signal;
• and
• an optical modulator configured to output an optical modulated signal based on a modulated signal subjected to the correction by the correction circuit.