A flat and stable multi-carriers generation scheme based on one integrated IQ modulator and its implementation for 112 Gb/s PM-QPSK transmitter

In this paper, the multi-carriers generation scheme based on only one integrated IQ modulator is investigated theoretically and numerically. The appropriate values of driving and biasing parameters and the symmetry of the flatness variance distribution of the generated multi-carriers are presented in theory and verified through simulation. Eleven flat and stable carriers with 11 GHz carrier spacing are obtained and 112 Gb/s PM-QPSK signal generation over one selected subcarrier has been experimentally demonstrated.