Space-Time-coded high-speed reconfigurable card-To-card free-space optical interconnects

Abstract

Space-Time-coded, free-space-based card-To-card optical interconnects for data centers and high-performance computing are proposed and experimentally demonstrated in this paper. Free-space propagation, which enables flexible and reconfigurable interconnections, is used in conjunction with 2 χ 2 extended Alamouti space-Time coding, which reduces the inter-channel crosstalk and improves the sensitivity of the interconnects. Experimental results show that, for 2 × 2 10 Gb/s reconfigurable optical interconnects, space-Time coding extends the maximum interconnection range by more than 48% and improves the receiver sensitivity. In addition, the impact of air turbulence on the proposed space-Time-c..