Associative holographic memory apparatus employing phase conjuga

Details Associative holographic memory apparatus employing phase conjuga Associative holographic memory apparatus employing phase conjuga

1986-01-22

1988-06-07

Fears, Terrell W.

Static information storage and retrieval

Information masking

Diffraction

365 49, 350 36, 356347, G11C 1304, G11C 1500, G03H 102

Patent

active

047501537

ABSTRACT:
Associative holography memory apparatus is disclosed which employs a hologram, two phase conjugate mirrors, and a two-wave mixing contra-directional coherent image amplifier. The mirrors and amplifier are arranged to form a conjugate resonator whereby the output image from the apparatus tends to converge to that stored image most closely associated with an input image. Alternate embodiments are described which employ a multiple storage and erasure hologram, and which employ only a single phase conjugate mirror.

REFERENCES:
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patent: 3614191 (1971-10-01), Sakaguchi et al.
patent: 4005935 (1977-02-01), Wang
patent: 4275454 (1981-06-01), Klooster, Jr.
patent: 4529273 (1985-07-01), Cronin-Golomb et al.
patent: 4598973 (1986-07-01), Greenleaf
Pepper, "Nonlinear Optical Phase Conjugation", Optical Engineering, Mar./Apr./1982, vol. 21, No. 2, pp. 156-183.
Yariv, "Phase Conjugate Optics and Real-Time Holography", IEEE Journal of Quantum Electronics, vol. QE-14, No. 9, Sep. 1978, pp. 650-660.
IBM Journal of Research and Development, vol. 13, No. 2, Mar. 1969, pp. 156-159.

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