A Novel Bias Control Technique for MZ Modulator with Monitoring Power of Backward Light for Advanced Modulation Formats

We propose a novel high-sensitive and cost-effective bias control scheme for MZ modulator with minimizing monitored power of backward-traveling light, and demonstrate its effectiveness with the experiments of 10-Gbit/s CSRZ and 43-Gbit/s RZ-DQPSK signals.