Semiconductor optical device

Details Semiconductor optical device Semiconductor optical device

2007-02-27

2007-02-27

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Particular active medium

C372S050220

Reexamination Certificate

active

11315415

ABSTRACT:
An optical device comprises a semiconductor structure including first and second ridge waveguides, each waveguide comprising a ridge extending across a surface of the semiconductor structure. The ridge of the first waveguide has a first height above a first region of the surface, and the ridge of the second waveguide has a second, greater, height above a second region of the surface. The semiconductor structure includes a multimode interference (MMI) region situated between the first and second ridge waveguides, which provides a transition between them. At least a part of the MMI region is tapered in width and/or at least a part of the first and/or second ridge waveguide is tapered in width in a direction extending away from the MMI region.

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