1982-01-29
1985-12-31
Corbin, John K.
G02F 103
Patent
active
045617287
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.
REFERENCES:
patent: 4364633 (1982-12-01), Verber et al.
patent: 4396246 (1983-08-01), Holman
patent: 4403833 (1983-09-01), Kenan et al.
patent: 4415226 (1983-11-01), Verber et al.
Taylor, "Integrated Optical Logic Circuits", Conference on Integrated & Guided Wave Optics, Utah, Jan. 1978.
Kotani et al., "Electrooptic . . . Waveguides", IEEE Journal of Quantum Elec., vol. QE-15, No. 5, May 1979.
Kenan Richard P.
Verber Carl M.
Battelle (Memorial Institute)
Corbin John K.
Dunson Philip M.
Lemmo Vincent J.
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