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Proceedings Paper

Space multiplexing in multistage optical interconnection networks
Author(s): Andrew S. Miller; Lily Cheng; Alexander A. Sawchuk
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Paper 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.

Paper Details

Date Published: 12 July 1993
PDF: 11 pages
Proc. SPIE 1806, Optical Computing, (12 July 1993); doi: 10.1117/12.147821
Show Author Affiliations
Andrew S. Miller, Univ. of Southern California (United States)
Lily Cheng, Univ. of Southern California (United States)
Alexander A. Sawchuk, Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 1806:
Optical Computing

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