Space multiplexing in multistage optical interconnection networks

Andrew S. Miller; Lily Cheng; Alexander A. Sawchuk

doi:10.1117/12.147821

12 July 1993 Space multiplexing in multistage optical interconnection networks

Andrew S. Miller, Lily Cheng, Alexander A. Sawchuk

Proceedings Volume 1806, Optical Computing; (1993) https://doi.org/10.1117/12.147821
Event: Topical Meeting on Optical Computing, 1992, Minsk, Belarus

Abstract

In this work, we investigate various approaches to reduce the overall complexity of optical MINs. We focus on a volume Omega network which uses 2-D perfect shuffles for the fixed interconnection at each stage. In the 1-D perfect shuffle, the N channels (assuming N is even) are divided into two halves, which are then interleaved perfectly. In the 2-D separable shuffle, the rows and the columns are shuffled independently by a sequence of 1-D perfect shuffles. The 2-D folded shuffle is equivalent to performing a 1-D perfect shuffle on a 1-D array folded onto a 2-D plane. The rows and the columns of the input are obtained by folding (raster scanning) an n² X 1 1-D input array onto an n X n 2-D input. A 1-D perfect shuffled version of the input can be obtained after unfolding the output plane of a properly shuffled 2-D output. This paper describes the architectural design of free space volume Omega networks using simplified hardware. Optics are used to perform the 2-D shuffles, and optoelectronic switch element arrays are used to perform the dynamic switching. Our main observation in this paper is that the regularity of the fixed link patterns at the stages allows us to use a single set of optics to perform 2-D shuffles for all the stages. We discuss two techniques for spatially multiplexing the channels so that all stages of shuffles can be performed by a single set of optics.

Citation Download Citation

Andrew S. Miller, Lily Cheng, and Alexander A. Sawchuk "Space multiplexing in multistage optical interconnection networks", Proc. SPIE 1806, Optical Computing, (12 July 1993); https://doi.org/10.1117/12.147821

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