Optical deflector and optical switch

Details Optical deflector and optical switch Optical deflector and optical switch

2005-09-20

2005-09-20

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Switch

C385S008000, C385S024000

Reexamination Certificate

active

06947625

ABSTRACT:
The optical deflector comprises: an optical waveguide12of a dielectric material having electrooptical effect; and a pair of electrodes10, 14opposed 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 waveguide12, 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 has 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.

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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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