Electrical isolation of opto-electronic device components
AssigneeHewlett-Packard Company
InventorJoseph Alan Barnard
Life of this patent
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Abstract
The present invention relates to the electrical isolation of components within an integrated opto-electronic device where two or more active regions are optically coupled, for example by a waveguide. The device includes a distributed feed-back laser diode and an electro-absorption modulator fabricated on the same substrate. The laser diode and modulator are: separated by an electrical isolation region; linked optically across the isolation region by a waveguide; and capped by a ternary cap layer through which ohmic contacts are made to operate the components. The cap layer extends to the isolation region from which a grounding contact is made to ground the cap layer in the isolation region and so to electrically isolate the laser diode and modulator from each other.
Claims22
An integrated opto-electronic device, comprising at least two opto-electronic components fabricated on the same substrate, two of the components being:
- separated by an electrical isolation region;
- linked optically across the isolation region by a waveguide;
- and capped by a contact layer through which ohmic contacts are made to operate the components, characterised in that the contact layer extends through the isolation region from which a grounding contact is made to ground the contact layer in the isolation region and to electrically isolate the two components from each other.
An integrated opto-electronic device, comprising at least two opto-electronic components fabricated on the same substrate, two of the components being:
- separated by an electrical isolation region;
- linked optically across the isolation region by a waveguide;
- and capped by a contact layer through which ohmic contacts are made to operate the components, characterised in that the contact layer extends to the isolation region from which a grounding contact is made to ground the contact layer in the isolation region and to electrically isolate the two components from each other, in which the contact layer provides a resistance of at least 1 kΩ between a component and the ground contact.
Dependencies are inferred from the claim text.