Optical printed circuit board with an efficient optical interface for 480-Gbps/cm 2 (20 Gbps × 12 ch × 2 layers) high-density opticall interconnections

We developed a high-speed (20 Gbps) and high-density (480 Gbps/cm 2 ) optical printed circuit board with a new two-lens optical interface for optical interconnections, and successfully demonstrated a 20-Gbps operation in our optical interconnection.