Invention Grant
US08649409B2 Surface-emitting laser device, optical scanner device, and image forming apparatus
有权
表面发射激光装置,光学扫描装置和图像形成装置
- Patent Title: Surface-emitting laser device, optical scanner device, and image forming apparatus
- Patent Title (中): 表面发射激光装置,光学扫描装置和图像形成装置
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Application No.: US13562896Application Date: 2012-07-31
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Publication No.: US08649409B2Publication Date: 2014-02-11
- Inventor: Toshihide Sasaki , Kazuhiro Harasaka
- Applicant: Toshihide Sasaki , Kazuhiro Harasaka
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2011-167955 20110801
- Main IPC: H01S5/00
- IPC: H01S5/00

Abstract:
A surface-emitting laser device includes a lower reflector, a resonator structure having an active layer and an upper reflector on an inclined substrate, and an emission region emitting laser light enclosed by an electrode. The upper reflector includes a confinement structure having a current passing region enclosed by an oxide containing at least an oxide generated as a result of partial oxidation of a layer containing aluminum subject to selective oxidation, and a dielectric film formed within the emission region, the dielectric film at least enclosing a partial region including a center of the emission region. In viewing from a direction orthogonal to the emission region, a center of a region enclosed by the dielectric film is located at a position distant from the center of the emission region based on a size of the confinement structure relative to a direction orthogonal to an inclined axis of the inclined substrate.
Public/Granted literature
- US20130033559A1 SURFACE-EMITTING LASER DEVICE, OPTICAL SCANNER DEVICE, AND IMAGE FORMING APPARATUS Public/Granted day:2013-02-07
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