A WDM-PON with 10-Gb/s symmetric bit-rates and multicast overlay with delay-based multicast control

We propose and experimentally demonstrate a WDM-PON with 10-Gb/s IRZ downstream point-to-point signals, 10-Gb/s DPSK downstream multicast signals, and 10-Gb/s NRZ upstream signals. The multicast control is achieved by simple electronic synchronization adjustment.