A novel WDM passive optical network architecture supporting two independent multicast data streams

We propose a novel scheme to perform optical multicast overlay of two independent multicast data streams on a wavelength-division-multiplexed (WDM) passive optical network. By controlling a sinusoidal clock signal and shifting the wavelength at the optical line terminal (OLT), the delivery of the two multicast data, being carried by the generated optical tones, can be independently and flexibly controlled. Simultaneous transmission of 10-Gb/s unicast downstream and upstream data as well as two independent 10-Gb/s multicast data was successfully demonstrated.

► We have successfully proposed a WDM–PON system which can support two independent multicast data streams.
► The multicast control is realized at the OLT by employing a control clock and wavelength shifting.
► A 10-Gb/s transmissions both for downstream and upstream has been demonstrated to show the feasibility of the scheme.