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Appl Opt. 2000 Oct 10;39(29):5367-73.

Planar-integrated optical vector-matrix multiplier.

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  • 1Optische Nachrichtentechnik, FernUniversit√§t Hagen, Feithstrasse 140/PRG, 58084 Hagen, Germany.


We present the design of a planar-integrated optoelectronic vector-matrix multiplier. The inherent parallel-processing potential is fully exploited by optical implementation of multiplications and summations. Planar integration makes the free-space optical system compatible with electronic VLSI technologies. It is composed of phase-only diffractive optical elements, which implement lens and multiple-beam-splitter functions. A demonstrator version of the optical system for a matrix of size 10 x 10 was fabricated on quartz glass by means of multimask lithography and reactive ion etching. It shows low cross talk and good uniformity of the signals.

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