  We demonstrate an all-optical four-channel wavelength multicasting in a
coupled Silicon microring resonator system. The scheme is based on two-photon
absorption induced free carrier dispersion in Silicon. The coupled cavity
facilitates resonance splitting that is utilized as individual channels for
multicasting. Using the split resonances, we achieve an aggregate multicasted
data rate of 48 Gbps (4X12 Gbps). Moreover, we also present a detailed analysis
and performance of the multicasting architecture.
