Simultaneous clock recovery for 160 Gbit/s optical time-division multiplexing signal using phase modulation

A phase-comparator-free clock recovery is proposed based on adding the base-rate clock to the optical time-division multiplexing signal through phase modulation. Successful retrieval of 10 GHz base-rate clock and error-free operation of 160 to 40 Gbit/s demultiplexing are demonstrated.