Invention Grant
US08736652B2 Surface-emitting laser device, surface-emitting laser array, optical scanner, image forming apparatus, and method for manufacturing surface-emitting laser device
有权
表面发射激光器件,表面发射激光器阵列,光学扫描器,成像设备和用于制造表面发射激光器件的方法
- Patent Title: Surface-emitting laser device, surface-emitting laser array, optical scanner, image forming apparatus, and method for manufacturing surface-emitting laser device
- Patent Title (中): 表面发射激光器件,表面发射激光器阵列,光学扫描器,成像设备和用于制造表面发射激光器件的方法
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Application No.: US13379160Application Date: 2011-05-18
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Publication No.: US08736652B2Publication Date: 2014-05-27
- Inventor: Kazuhiro Harasaka , Shunichi Sato , Masahiro Hayashi , Akihiro Itoh , Katsunari Hanaoka
- Applicant: Kazuhiro Harasaka , Shunichi Sato , Masahiro Hayashi , Akihiro Itoh , Katsunari Hanaoka
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2010-118940 20100525; JP2011-050962 20110309
- International Application: PCT/JP2011/061918 WO 20110518
- International Announcement: WO2011/148957 WO 20111201
- Main IPC: B41J2/45
- IPC: B41J2/45 ; H01S5/00

Abstract:
A surface-emitting laser device includes a transparent dielectric layer provided in an emitting region and configured to cause a reflectance at a peripheral part to be different from a reflectance at a central part in the emitting region. In the surface-emitting laser device, the thickness of a contact layer is different between a region having a relatively high reflectance and a region having a relatively low reflectance in the emitting region. The contact layer is provided on the high refractive index layer of an upper multilayer film reflecting mirror, and the total optical thickness of the high refractive index layer and the contact layer in the region having the relatively low reflectance is deviated from an odd number multiple of a one quarter oscillation wavelength of laser light emitted from the emitting region.
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