Invention Grant
- Patent Title: Surface-emitting laser device, surface-emitting laser array, optical scanning apparatus and image forming apparatus
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Application No.: US13127845Application Date: 2009-11-24
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Publication No.: US08483254B2Publication Date: 2013-07-09
- Inventor: Kazuhiro Harasaka , Shunichi Sato , Naoto Jikutani
- Applicant: Kazuhiro Harasaka , Shunichi Sato , Naoto Jikutani
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2008-302450 20081127; JP2009-122907 20090521
- International Application: PCT/JP2009/070087 WO 20091124
- International Announcement: WO2010/061947 WO 20100603
- Main IPC: H01S5/00
- IPC: H01S5/00

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.
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