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US 7,453,914 B2Granted
Optical element
AssigneeSeiko Epson Corporation
InventorTomoko Koyama
Life of this patent
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Abstract
An optical element includes a surface-emitting type semiconductor laser, and a light-receiving element that detects a part of laser light emitted from the surface-emitting type semiconductor laser, wherein the light-receiving element is formed above the surface-emitting type semiconductor laser and includes a semiconductor layer having one or more layers, and at least one of the layers in the semiconductor layer has a plane configuration that has anisotropy.
Claims10
An optical element comprising:
- a surface-emitting type semiconductor laser includes a substrate, a first mirror, an active layer, and a second mirror having a current constricting layer arranged from the side of the substrate;
- a light-receiving element that detects a part of laser light emitted from the surface-emitting type semiconductor laser;
- and
- an isolation layer between the surface-emitting type semiconductor laser and the light-receiving element for electrically isolating the surface-emitting type semiconductor laser from the light-receiving element, the isolation layer directly contacting the second mirror,
- wherein the isolation layer has a plane configuration that has anisotropy,
- an opening section defined by the current constricting layer has a plane configuration that has anisotropy, and
- the light-receiving element is formed above the surface-emitting type semiconductor laser and includes a semiconductor layer having one or more layers, and at least one of the layers in the semiconductor layer has a plane configuration that has anisotropy.
4 more elements
Dependencies are inferred from the claim text.