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<p>Introduces two hierarchical optical structures for processor interconnection and compares their performance through analytic models and discrete-event simulation. Both architectures are 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 architectures is to achieve scalability yet avoid the requirement of multiple wavelength tunable devices per node. Furthermore, both hierarchical architectures are single-hop: a packet remains in the optical form from source to destination and does not require cross dimensional intermediate routing.</p>
hierarchical; photonic architectures; optical structures; processor interconnection; analytic models; discrete-event simulation; wavelength division multiplexing; hierarchical architectures; single-hop; optical fiber communication; parallel computer architecture; discrete event simulation; optical interconnections; parallel architectures; wavelength division multiplexing.

J. Perreault, K. Bogineni, K. Aly and P. Dowd, "Hierarchical Scalable Photonic Architectures for High-Performance Processor Interconnection," in IEEE Transactions on Computers, vol. 42, no. , pp. 1105-1120, 1993.
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