Patent
1988-08-22
1990-08-14
Arnold, Bruce Y.
350370, 350374, G02F 129, G03H 122
Patent
active
049482122
ABSTRACT:
Optical processing using photorefractive GaAs and other compound semiconductor crystals (28) is achieved in a four-wave mixing configuration. Potential applications of optical processing include spatial light modulation, phase conjugation, correlation, convolution, edge enhancement, matrix multiplication, incoherent-to-coherent conversion, and many others. In particular embodiments, optical processing, matrix multiplication, and integrated semiconductor optical information processors are demonstrated. In the case of integration of semiconductors and optical information processors, a spatial light modulator (88) is fabricated on a surface of a compound semiconductor crystal to form an integrated device (86). The device uses the spatial light modulator to transfer electrical data into an optical form and then employs the photorefractive effect in the bulk for processing the data.
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Borshch et al., "New Mechanism for High-Speed Recording and Erasure of Dynamic Holograms"; Sov. Tech. Phys. Letters, vol. 5, No. 2; Feb. 1979; pp. 94-95.
Cheng Li-Jen
Gheen Gregory O.
Arnold Bruce Y.
California Institute of Technology
Callaghan Terry S.
Collins David W.
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