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:
Dec. 31, 1985
Filed:
Jan. 29, 1982
Richard P Kenan, Upper Arlington, OH (US);
Carl M Verber, Columbus, OH (US);
Battelle Memorial Institute, Columbus, OH (US);
Abstract
Apparatus receives light (11) in an input direction (12) and controls the directions in which portions of it travel through adjacent regions (13,14,15,16) in a waveguide (19) to emerge (at 17) in an output direction (18) with intensity responsive to a plurality of electrical potential differences (A1-A2, etc.). A plurality of electrooptic reflective means (20), each comprising a pair of electrodes (21,22, etc.), with each reflective means (20A,20B,20C,20D) on a different region (13,14,15,16), form a separate Bragg grating in each region with a direction of Bragg incidence in the input direction (12). A prism (29) directs light (11) from a laser (30) to enter in the input direction (12) into each electrooptic means (20). A plurality of control means (A,B,C,D), one for each region, each comprising means for applying a first electrical potential (A1,B1,C1, or D1) to the first electrode (21,23,25, or 27) and means for applying a second electrical potential (A2,B2,C2, or D2) to the second electrode (22,24,26, or 28) of the electrooptic reflective means (20A,20B,20C, or 20D) in the individual region (13,14,15, or 16), further direct a portion of the light (11) entering into the individual region (13, etc.) by providing a Bragg reflection thereof beyond the region (as at 17) in the output direction (18) to output means (32,33), which receive the light (17) and respond to it.