Optical Pipelined Multi-bus Interconnection Network Intrinsic Topologies

Abstract

Digital all-optical parallel computing is an important research direction and spans conventional devices and convergent nano-optics deployments. Optical busbased interconnects provide interesting aspects such as relative information communication speed-up or slowdown between optical signals. This aspect is harnessed in the newly proposed All-Optical Linear Array with a Reconfigurable Pipelined Bus System (OLARPBS) model. However, the physical realization of such communication interconnects needs to be considered. This paper considers spatial layouts of processing elements along with the optical bus light paths that are necessary to realize the corresponding interconnection requirements. A metric in terms of the degree of required physical constraint is developed to characterize the variety of possible solutions. Simple algorithms that determine spatial layouts are given. It is shown that certain communication interconnection structures have associated intrinsic topologies.