Patent ID: 8405897

Claim:
An electrically controlled optical oscillator for a single-side-subcarrier optical phase-locked loop, comprising: electrically controlled electrical oscillator having an input configured for receiving an electrical driving input signal (V PDF ) and an output configured for supplying an electrical driving output signal (V EVCO ) having a frequency (F EVCO ) that is a function of said electrical driving input signal (V PDF ); a continuous-wave laser source configured for supplying an optical carrier (S OC ); and optical modulator having an optical input connected to said laser source for receiving said optical carrier (S OC ), an electrical input connected to said output of said electrically controlled electrical oscillator for receiving said electrical driving output signal (V EVCO ), and an optical output configured for modulating said optical carrier (S OC ) with said electrical driving output signal (V EVCO ) and thus generating an optical modulated signal ({right arrow over (S)} 7 2 ); wherein said optical modulator is configured for generating an optical modulated signal ({right arrow over (S)} 2 ) with a single optical subcarrier.