Integrated electro-optical scanner with photoconductive substrat

Details Integrated electro-optical scanner with photoconductive substrat Integrated electro-optical scanner with photoconductive substrat

1991-04-01

1992-03-03

Gonzalez, Frank

Optical waveguides

Directional optical modulation within an optical waveguide

Electro-optic

385 14, 385143, G02B 610

Patent

active

050938746

ABSTRACT:
A fully integrated electro-optic page-scanner comprises an optically transparent waveguide made from an electro-optic polymer, and an electrode structure including a linear array of electrically-addressable, spaced, parallel electrodes for selectively altering the refractive index across pixel-sized portions of the polymeric waveguide. According to the invention, the addressable electrodes are disposed on a photoconductive substrate which facilitates poling of the polymer waveguide to rander it electro-optic in nature. During the poling process, the photoconductive substrate is made electrically conductive by flood illumination, while a uniform electric field is established between the substrate and a transparent electrode which overlies the waveguide layer, opposite the addressable electrodes. Preferably, the photoconductive substrate comprises undoped silicon which enables certain electrode-addressing circuitry to be integrated within the scanner structure.

REFERENCES:
patent: 4792208 (1988-12-01), Ulman et al.
patent: 4844577 (1989-07-01), Ninnis et al.
patent: 4948225 (1990-08-01), Rider et al.
patent: 4955977 (1990-09-01), Das et al.
patent: 5009483 (1991-04-01), Rockwell, III

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