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Design and analysis of a hierarchical scalable photonic architecture

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4 Author(s)
P. W. Dowd ; Dept. of Electr. & Comput. Eng., State Univ. of New York, Buffalo, NY, USA ; K. Bogineni ; K. A. Aly ; J. A. Perreault

This paper introduces a hierarchical optical structure for processor interconnection and evaluates its performance. The architecture is based on wavelength division multiplexing (WDM) which enables multiple multi-access channels to be realized on a single optical fiber. The objective of the hierarchical architecture is to achieve scalability yet avoid the requirement of multiple wavelength tunable devices per node as with the WDM-based hypercube interconnection scheme. Furthermore, single-hop communication is achieved: a packet remains in the optical form from source to destination and does not require cross dimensional intermediate routing. The wavelength multiplexed hierarchical structure features wavelength channel re-use at each level, allowing scalability to very large system sizes. It employs acousto-optic tunable filters in conjunction with passive couplers to partition the traffic between different levels of the hierarchy without electronic intervention. A significant advantage of the proposed structure is its ability to dynamically vary the bandwidth provided to different levels of the hierarchy. The architecture is compared to a wavelength-flat architecture in terms of physical and performance scalability

Published in:

High Performance Distributed Computing, 1993., Proceedings the 2nd International Symposium on

Date of Conference:

20-23 Jul 1993