Surface-emitting laser device, surface-emitting laser array, optical scanning apparatus and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsKazuhiro Harasaka, Shunichi Sato, Naoto Jikutani
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Abstract
A surface-emitting laser device configured to emit laser light in a direction perpendicular to a substrate includes a p-side electrode surrounding an emitting area on an emitting surface to emit the laser light; and a transparent dielectric film formed on an outside area outside a center part of the emitting area and within the emitting area to lower a reflectance to be less than that of the center part. The outside area within the emitting area has shape anisotropy in two mutually perpendicular directions.
Claims26
A surface-emitting laser device configured to emit laser light in a direction perpendicular to a substrate comprising:
- a p-side electrode surrounding an emitting area on an emitting surface to emit the laser light;
- and
- a transparent dielectric film formed on an outside area outside a center part of the emitting area and within the emitting area to lower a reflectance to be less than that of the center part,
- wherein the outside area within the emitting area has shape anisotropy in two mutually perpendicular directions.
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13-16. (canceled)
The surface-emitting laser device as claimed in claim 16,
- wherein the third dielectric film covering the outside area other than the plural small areas and the dielectric film formed on the plural small areas include a common material.
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A surface-emitting laser array configured to emit a plurality of laser lights in a direction perpendicular to a substrate comprising:
- a plurality of surface-emitting laser devices integrated on the substrate,
- wherein the surface-emitting laser device includes
- a p-side electrode surrounding an emitting area on an emitting surface to emit the laser light;
- and
- a transparent dielectric film formed on an outside area outside a center part of the emitting area and within the emitting area to lower a reflectance to be less than that of the center part,
- wherein the outside area within the emitting area has shape anisotropy in two mutually perpendicular directions.
Dependencies are inferred from the claim text.