Device for modulating light

Details Device for modulating light Device for modulating light

1975-09-10

1977-10-18

Corbin, John K.

350160R, G02B 514

Patent

active

040543625

ABSTRACT:
A device for modulating light characterized by an electro-optical crystal which is either a solid crystal or a liquid crystal having an index of refraction greater than the index of refraction of the substrate on which the crystal is disposed and having a surface opposite the substrate covered with a dielectric material having an index of refraction less than the index of refraction of the crystal. A plurality of strip electrodes are disposed on the layer with adjacent electrodes connected to different terminals to form an interdigital electrode structure. When a modulating voltage is applied to the interdigital electrode structure, electrical fields are created between the electrode strips extending parallel to the direction of light propagation in the crystal to change the index of refraction to cause modulation of the light.

REFERENCES:
patent: 3464762 (1969-09-01), Kahng
patent: 3811912 (1974-05-01), Ramaswamy
patent: 3813142 (1974-05-01), Buhrer
patent: 3923376 (1975-12-01), Martin
Channin, D. J., "Optical Waveguide modulation using nematic Liquid Crystal", Appl. Phys. Lett., vol. 22, No. 8, Apr. 15, 1973 pp. 365-366.
Sheridan, J. P., Giallorenzi T. G., "Electro-optically induced deflection in liquid crystal waveguides", J. of Applied Physics, vol. 45, No. 12, Dec. 1974 pp. 5160-5163.

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