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Proceedings Paper

Reconfigurable free-space optical interconnection module for pipelined optoelectronic parallel processing
Author(s): Masatoshi Ishikawa; Makoto Naruse; Alain Goulet; Haruyoshi Toyoda; Yuji Kobayashi
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Paper Abstract

Optical interconnections and integrated optoelectronic devices are expected to be promising candidates that expand interconnection bandwidth between large-scale integrated circuits (LSIs). We have constructed an optoelectronic parallel computing system that has a reconfigurable free- space parallel optical interconnection module called OCULAR- II. It has a multi-layer architecture that eliminates the data transfer bottleneck between optoelectronic processing modules by reconfigurable free-space optical interconnections. An optoelectronic processing module is composed of a two-dimensional processing element array where each pixel has its own optical output channel by a VCSEL and optical input channel. The optical interconnection is integrated into a compact module where an optically addressable phase only spatial light modulator and an imaging optical system are compactly fabricated. Each component of the OCULAR-II system has been designed to be modular and compact. Therefore, just cascading optoelectronic processing modules and optical interconnection modules makes a pipelined parallel processing system. In the optical interconnection module, a custom designed Fourier Transform lens has been used to reduce the working distance of the lens system. A computer generated hologram (CGH) is written on a liquid crystal display (LCD) that is coupled by a fiber optic plate (FOP) to the optically addressable SLM. The interconnection topology between optoelectronic chips is controlled by changing the CGH patterns, which is calculated in advance. A global interconnectivity among processor arrays is also achievable since the communication channels are constructed via optical path in free space. The data broadcasting between processors that are located spatially far away can be efficiently implemented by free-space optical links in OCULAR-II's optical interconnection module.

Paper Details

Date Published: 8 November 2001
PDF: 6 pages
Proc. SPIE 4457, Spatial Light Modulators: Technology and Applications, (8 November 2001); doi: 10.1117/12.447741
Show Author Affiliations
Masatoshi Ishikawa, Univ. of Tokyo (Japan)
Makoto Naruse, Univ. of Tokyo (Japan)
Alain Goulet, Univ. of Tokyo (Belgium)
Haruyoshi Toyoda, Hamamatsu Photonics K.K. (Japan)
Yuji Kobayashi, Hamamatsu Photonics K.K. (Japan)


Published in SPIE Proceedings Vol. 4457:
Spatial Light Modulators: Technology and Applications
Uzi Efron, Editor(s)

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