Jds Uniphase Corporation

Hirotoshi Nagata

Karl M Kissa

Gilbert Feke

The present invention discloses an electro-optic waveguide device such as a modulator. The device has an electro-optic substrate having optical waveguides within the substrate at or near an upper surface. A buffer layer is formed on the top surface of the electro-optic substrate. A novel block layer is formed on the buffer layer surface, which can suppress or lessen an unwanted occurrence of chemical reactions at or near the surface of the buffer layer. A charge bleed off layer is formed on the block layer, which has a certain amount of electrical conductivity to bleed off any electrical charges generated on or in the electro-optic waveguide device. Electrodes are on the charge bleed off layer, which can provide electrical signals to the optical waveguides through the buffer layer, the block layer, and the charge bleed off layer.

Electro-optic waveguide device capable of suppressing bias point DC drift and thermal bias point shift

An optical modulator which has substantially low loss and has an improvement in voltage reduction is disclosed having an electro-optic lithium niobate substrate. The substrate has first, second and third ridges extending along its surface. Extending along the first and second ridges are first and second waveguides. A first RF electrode extends over the first waveguide and a second slotted electrode including a first section extends over the second waveguide. A second section of the slotted extends parallel to and adjacent to the first section on the third ridge. In summary, this invention provides a slotted ground electrode wherein a slot is formed in the substrate between the slotted electrode.

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Avon, CT, United States of America

Hirotoshi Nagata