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Proceedings Paper

Optical interconnects for multiprocessors in computer backplane
Author(s): Tae-Jin Kim; Kun-Yii Tu; Darrell Ramsey; Tchang-Hun Oh; Raymond K. Kostuk
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Paper Abstract

Optical interconnects have potential advantage over electrical methods at the backplane level. In this paper we present a free-space optical connection cube for backplane interconnect applications. The connection cube has a symmetric structure which reduces skew between boards. It can be expanded into a 3-dimensional configuration for parallel communication using vertical-cavity surface-emitting laser (VCSEL) and receiver arrays. Fan-out and fan-in of propagation beams for the connection cube are realized using volume holographic optical elements formed in dichromated gelatin (DCG) emulsion. A four-port communication system has been demonstrated using the connection cube and tested at 500 MHz. In this paper, advantages and detailed implementation of the free-space optical connection cube are presented. Design considerations for fan-out/in holographic gratings and alignment tolerances for the connection cube are discussed. Characteristics of the connection cube are also presented.

Paper Details

Date Published: 5 April 1995
PDF: 12 pages
Proc. SPIE 2400, Optoelectronic Interconnects III, (5 April 1995); doi: 10.1117/12.206309
Show Author Affiliations
Tae-Jin Kim, Optical Sciences Ctr./Univ. of Arizona (United States)
Kun-Yii Tu, Optical Sciences Ctr./Univ. of Arizona (United States)
Darrell Ramsey, Optical Sciences Ctr./Univ. of Arizona (United States)
Tchang-Hun Oh, Optical Sciences Ctr./Univ. of Arizona (United States)
Raymond K. Kostuk, Optical Sciences Ctr./Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 2400:
Optoelectronic Interconnects III
Ray T. Chen; Harvard Scott Hinton, Editor(s)

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