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Applied Optics

Applied Optics


  • Vol. 35, Iss. 35 — Dec. 10, 1996
  • pp: 6909–6919

Experimental demonstration of the optical multi-mesh hypercube: scaleable interconnection network for multiprocessors and multicomputers

Ahmed Louri, Stephen Furlonge, and Costas Neocleous  »View Author Affiliations

Applied Optics, Vol. 35, Issue 35, pp. 6909-6919 (1996)

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A prototype of a novel topology for scaleable optical interconnection networks called the optical multi-mesh hypercube (OMMH) is experimentally demonstrated to as high as a 150-Mbit/s data rate (27 − 1 nonreturn-to-zero pseudo-random data pattern) at a bit error rate of 10−13/link by the use of commercially available devices. OMMH is a scaleable network [Appl. Opt. 33, 7558 (1994); J. Lightwave Technol. 12, 704 (1994)] architecture that combines the positive features of the hypercube (small diameter, connectivity, symmetry, simple routing, and fault tolerance) and the mesh (constant node degree and size scaleability). The optical implementation method is divided into two levels: high-density local connections for the hypercube modules, and high-bit-rate, low-density, long connections for the mesh links connecting the hypercube modules. Free-space imaging systems utilizing vertical-cavity surface-emitting laser (VCSEL) arrays, lenslet arrays, space-invariant holographic techniques, and photodiode arrays are demonstrated for the local connections. Optobus fiber interconnects from Motorola are used for the long-distance connections. The OMMH was optimized to operate at the data rate of Motorola’s Optobus (10-bit-wide, VCSEL-based bidirectional data interconnects at 150 Mbits/s). Difficulties encountered included the varying fan-out efficiencies of the different orders of the hologram, misalignment sensitivity of the free-space links, low power (1 mW) of the individual VCSEL’s, and noise.

© 1996 Optical Society of America

Original Manuscript: February 12, 1996
Revised Manuscript: June 12, 1996
Published: December 10, 1996

Ahmed Louri, Stephen Furlonge, and Costas Neocleous, "Experimental demonstration of the optical multi-mesh hypercube: scaleable interconnection network for multiprocessors and multicomputers," Appl. Opt. 35, 6909-6919 (1996)

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