Clock Synchronized Transmission of 51.2 GBd Optical Packets for Optically Switched Data Center Interconnects

Optical switching has attracted significant attention in recent research on data center networks (DCNs) as it is a promising viable route for the further scaling of hyper scale centers, so that DCNs can keep pace with rapid growth machine-to-machine traffic. It been shown optical clock synchronization enables sub-nanosecond and recovery time crucial to high performance optically switched DCN. Moreover, interconnect rate expected increase from current 100 Gb/s per fiber 800 beyond, requiring baud signaling at >50 GBd. Thus, future DCN should support GBd transmission synchronization. Here, we demonstrate clock-synchronized 128-byte packets 51.2 study impact reference phase noise system performance, focusing tolerance misalignment affects scalability reliability. By comparing tolerable sampling offsets using different clocks, show offset window about 8 ps could be achieved <0.2ps source clock. Furthermore, model numerically de-correlation noise. This allows total jitter estimated, thereby, estimation generations rate, synchronized DC interconnects.