Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1983-05-24
1986-05-06
Arnold, Bruce Y.
Static information storage and retrieval
Magnetic bubbles
Guide structure
35016212, 365216, G03H 102, G02B 2746, G11B 700
Patent
active
045867798
ABSTRACT:
Device for memory-storage of a coherent image in a multimode optical cavity. A coherent light source generates a signal wave and a reference wave and provides these waves to optical guiding devices. These optical guiding devices form a closed loop in which the signal wave circulates. The guiding devices form a multimode optical cavity having a Fourier plane. An amplifying interactive medium is disposed within the cavity on the path of the signal wave and at the Fourier plane. Within the interactive medium, the signal wave interferes with the reference wave in order to create a diffraction grating. Each signal wave thus receives energy from the reference wave with which it interferes. A semi-transparent beam splitter is disposed within the cavity on the path of the signal wave in order to extract a portion of the energy from the optical cavity.
REFERENCES:
patent: 3466110 (1969-09-01), Pole et al.
patent: 3632182 (1972-01-01), Sincerbox
patent: 4284324 (1981-08-01), Huignard et al.
patent: 4451151 (1984-05-01), Huignard
Huignard, J. P. et al, "Coherent Signal Beam Amplification in Two-Wave Mixing Experiments with Photorefractive Bi.sub.12 SiO.sub.20 Crystals", Optics Communications, vol. 38, No. 4, pp. 252-254.
Marrakchi A. et al, "Application of Phase Conjugation in Bi.sub.12 SiO.sub.20 Crystals to Mode Pattern Visualisation of Diffuse Vibrating Structures" pp. 15-18 of Optics Communications, vol. 34, No. 1, Jul., 1980.
Sincerbox, G. T. et al, "System to Increase the Efficiency of the Holographic Energy Distribution for Individual Chip Replacement" IBM Tech Disc. Bull. vol. 23, No. 2 Jul. 1980 pp. 831-832.
Herriau Jean-Pierre
Huignard Jean-Pierre
Ledoux Isabelle
Rak Daniel
"Thomson-CSF"
Arnold Bruce Y.
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