Chip-Scale Photonic Architectures using Wavelength-Selective Spatial Routing for High-Performance Interconnection Networks
Modern chip-scale computing system performance is increasingly becoming determined by the characteristics of the interconnection network. Photonic technology has been proposed as an alternative to traditional electronic interconnects for its advantages in bandwidth density, latency, and power efficiency. Circuit-switched photonic network architectures take advantage of the optical spectrum to create high-bandwidth transmission links through the transmission of data channels on multiple parallel wavelengths. However, this technique suffers from low path diversity and high setup-time overhead, which consequentially induces high network resource contention and long latencies. This paper improves upon the circuit-switching paradigm by introducing the use of wavelength-selective spatial routing to produce multiple logical communication layers on a single physical photonic plane.