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 × 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.
© 2000 Optical Society of America
(050.1970) Diffraction and gratings : Diffractive optics
(200.0200) Optics in computing : Optics in computing
(200.4490) Optics in computing : Optical buffers
(200.4860) Optics in computing : Optical vector-matrix systems
(350.3950) Other areas of optics : Micro-optics
Matthias Gruber, Jürgen Jahns, and Stefan Sinzinger, "Planar-Integrated Optical Vector-Matrix Multiplier," Appl. Opt. 39, 5367-5373 (2000)