AWGR-based large port count data center architecture with extended frequency range

Arrayed Waveguide Grating Router (AWGR) is currently one of the most promising components in data center interconnections for its passive and non-blocking feature. However, the scalability is restricted by the limited channel count. In this paper, by using multiple free spectral ranges (FSRs) of AWGR and couplers, we report a novel data center architecture with extended frequency range. By simulation, we prove that, with limited FSRs, tens of thousands port count data center can be realized using a single 32 × 32 AWGR with less than 1 ms average delay and less than 0.1% blocking rate.