Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1996-07-29
1998-08-25
Ngo, John
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
385 8, 385 9, 385 12, G02B 610
Patent
active
057991162
ABSTRACT:
An electromagnetic wave-to-optical signal converting and modulating device includes: a substrate presenting the electro-optical effect; at least a pair of optical waveguide paths which are formed on the substrate and arranged in parallel to each other and are joined at their ends; electrodes which are formed along the optical waveguide paths and have the antenna function for detecting electric field signals around the external space; a light supplying means with an optical fiber cable for supplying light to the optical waveguide paths; and an optical detector with a light signal receiver for detecting and processing the light emitted from the optical waveguide paths. This device directly modulates the light which is passing through the waveguide paths with an external space electric field signal carrying information. In this arraignment, when the light signal has a predetermined frequency, the light signal and the external space electric field signal are directly mixed so that the electric field signal is converted down.
REFERENCES:
patent: 5076655 (1991-12-01), Bridges
patent: 5488677 (1996-01-01), Tokano
patent: 5574805 (1996-11-01), Toba et al.
"Photonic Systems for Antenna Applications", M. L. VanBlaricum, IEEE Antennas and Propagation Magazine, vol. 36, No. 5, Oct. 1994 pp. 30-38.
Ngo John
Sharp Kabushiki Kaisha
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