Multiprocessor silicon photonic interconnects: a systems perspective
2012
The high bandwidth density and low power consumption characteristics of silicon photonics devices can provide
a high performance interconnect solution for multiprocessor systems. At the same time this technology also
poses a new set of constraints and challenges in architecting, designing, and integrating such systems.
The "macrochip" multiprocessor architecture leverages a photonically interconnected array of processor and/or
memory chips to provide a flexible platform to build heterogeneous systems. The design considerations for such
a system are influenced largely by the system architecture, the programming model and devices needed for
their implementation. This talk will first describe the macrochip platform, technology constraints and potential
interconnect solutions with the various device building blocks. Then it will present some topology choices that
range from a WDM point-to-point interconnect to more complex switched data channel networks. It will close
with a detailed analysis of these design choices and show the impact of the device constraints on performance
and power consumption along with some recent ultra-low power device implementation results.
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