Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2007-09-14
2008-09-16
Pak, Sung (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S008000, C385S009000
Reexamination Certificate
active
07426326
ABSTRACT:
An electro-optic modulator having a substrate, one or more optical waveguides, at least one active electrode formed on the substrate and aligned over the optical waveguide, the active electrode operating to induce a refractive index change in the optical waveguide. The active electrode has a lower surface arranged facing the substrate, an upper surface arranged away from the substrate, substantially planar side walls, and rounded corners between the side walls and the lower surface of the active electrode. The electrode can be a bridge electrode, with two lower portions and an upper portion connected to the lower portions, the lower portions spaced apart from each other, each of the two lower portions of the active electrode extending over one of the optical waveguides. Each of the lower portions has rounded convex corners. The upper surface of the electrode can also have rounded corners or a completely rounded upper surface.
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Cole James H
Moeller Robert P
Ferrett Sally A
Karasek John J
Pak Sung
Petkovsek Daniel
The United States of America as represented by the Secretary of
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