The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2009
Filed:
Feb. 29, 2008
Applicants:
Hitoshi Shimizu, Tokyo, JP;
Takeo Kageyama, Tokyo, JP;
Inventors:
Hitoshi Shimizu, Tokyo, JP;
Takeo Kageyama, Tokyo, JP;
Assignee:
The Furukawa Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/20 (2006.01); H01S 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical resonator including a lower multilayer reflector and an upper multilayer reflector is arranged on a substrate. A strained active layer having a multiple quantum well structure formed with a quantum well layer and a barrier layer is arranged in the resonator. A current confinement layer including a selectively oxidized portion is arranged on an upper side of the strained active layer. The current confinement layer is arranged at a position where a strain in the selectively oxidized portion influences the strained active layer.