Optical waveguides – Directional optical modulation within an optical waveguide
Reexamination Certificate
2005-05-10
2005-05-10
Font, Frank G. (Department: 2883)
Optical waveguides
Directional optical modulation within an optical waveguide
C385S001000, C385S002000, C385S004000, C385S005000, C385S006000, C385S007000, C385S008000
Reexamination Certificate
active
06891982
ABSTRACT:
An optical waveguide for guided an incident light is formed on a substrate having an electro-optic effect. A first buffer layer is formed to cover an upper surface of the substrate. A conductive film is formed above the first buffer layer. A center electrode and a ground electrode are formed for applying a voltage in order to induce an electric field in the optical waveguide. A second buffer layer is formed between the conductive film and at least one of the center electrode and the ground electrode. The conductive film is formed to be present on at least a part below the ground electrode. A light guided through the optical waveguide is modulated by changing a phase by a voltage applied to the optical waveguide. Thereby, a thermal drift can be effectively restricted so that an optical modulation device having excellent electric characteristics can be realized.
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Kawano Kenji
Nakahira Toru
Nanami Masaya
Sato Yuji
Uchida Seiji
Anritsu Corporation
El-Shammaa Mary
Font Frank G.
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