The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 1983
Filed:
Aug. 18, 1981
Richard P Kenan, Upper Arlington, OH (US);
Carl M Verber, Columbus, OH (US);
Battelle Memorial Institute, Columbus, OH (US);
Abstract
Apparatus (FIG. 2) receives light (11) in an input direction (12) and controls the directions in which portions of it travel through regions (13,14) to emerge (at 15) in an output direction (16) with intensity responsive to the product of two electrical potential differences multiplied together. Electrooptic reflective means (18) comprising two electrodes (19,20), on a region (13) in a waveguide (17), form a first Bragg grating (18) with a direction of Bragg incidence in the input direction (12). Similar means (23) comprising two electrodes (24,25), on a region (14), form a second Bragg grating (23) with a direction of Bragg incidence the same as a direction of Bragg reflection (22) from the first grating. A prism (26) directs light (11) from a laser (27) to enter in the input direction (12) into the electrooptic means (18). Control means (28) apply a potential difference (A) to the electrodes (19,20), to further direct light (11) in the region (13) by providing a first Bragg reflection thereof into the region (14). Control means (30) apply a potential difference (B) to the electrodes (24,25), to further direct light (11) by providing a second Bragg reflection thereof in the output direction (16) to output means (35,33) (FIG. 3), which receive the twice-reflected light and respond thereto. Apparatus as in FIGS. 3 and 5 can perform multiplication of vectors, and of a matrix by a vector.