Optical waveguide element

Details Optical waveguide element Optical waveguide element

2006-04-25

2006-04-25

Glick, Edward J. (Department: 2882)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

C385S014000

Reexamination Certificate

active

07035488

ABSTRACT:
A first branched optical waveguide and a second branched optical waveguide, to constitute a Mach-Zehnder type optical waveguide, are formed at the surface of a substrate. A first ground electrode, a signal electrode and a second ground electrode are provided on a buffer layer formed on the substrate. The second ground electrode is partially cut away and divided, to form a ditch therein, so that the modulating electrode composed of the signal electrode, the first and the second ground electrodes are substantially symmetrized on the center line between the first and the second optical waveguides. Then, the ratio (d2/d1) of the distance d2between the signal electrode and the second branched optical waveguide to the distance d1between the signal electrode and the first electrode is set within 3.5–7.5.

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