Optical deflector and optical switch

Details Optical deflector and optical switch Optical deflector and optical switch

2005-04-12

2005-04-12

Connelly-Cushwa, Michelle R. (Department: 2874)

Optical waveguides

Directional optical modulation within an optical waveguide

Electro-optic

C385S130000

Reexamination Certificate

active

06879739

ABSTRACT:
An optical deflector including an optical waveguide of a dielectric material having electrooptical effect; and a pair of electrodes opposed to each other across the optical waveguide. An electric field is applied between the opposed electrodes to change a refractive index of the dielectric material to thereby control a propagating direction of signal light propagating in the optical waveguide, wherein the dielectric material has a first refractive index in its initial state, has a second refractive index by application of an electric field of a first polarity, and retains as a third refractive index a refractive index obtained after the electric field has been removed. The dielectric material having the third refractive index has the first refractive index by the application of an electric field of a second polarity different from the first polarity and removal of the electric field.

REFERENCES:
patent: 6449084 (2002-09-01), Guo
patent: 20030026545 (2003-02-01), Deliwala
patent: 9-5797 (1997-01-01), None
Chen, et al.; “Guided-Wave Electro-Optic Beam Deflector Using Domain Reversal in LiTaO3”;Journal of Lightwave Technology; vol. 12, No. 8; Aug. 1994; pp. 1401-1404.
Markowski, et al., “Effect of Compositional Variations in the Lead Lanthanum Zirconate Stannate Titanate System on Electrical Properties”;Journal of American Ceramic Society; vol. 79, No. 12, Dec. 1996; pp. 3297-3304.
Uchino; “Shape Memory Material Using Antiferroelectrics”;Oyo Buturi; vol. 54, Jun. 1985; pp. 591-595.

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