Semiconductor strip active optical device

Details Semiconductor strip active optical device Semiconductor strip active optical device

1994-08-29

1995-08-15

Ullah, Akm E.

Optical waveguides

Planar optical waveguide

G02B 610

Patent

active

054427231

ABSTRACT:
A guide structure of a strip semiconductor active optical device includes a core structure extending as far as coupling surfaces. It includes at least three high index layers having refractive indices increased relative to that of the surrounding media to increase in these layers the power density of light to be processed, for example amplitude modulated, by the device. The high index layers have compositions such that they can apply this processing in response to electrical excitation and thicknesses greater than those of quantum wells. They are separated by lower refractive index dilutant layers with greater thicknesses such that a single propagation mode of light is guided by the guide structure. This mode has a thickness suited to coupling to an external optical component whilst confining the majority of the power of the light within the thickness of the core structure to favor the processing.

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