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:
Mar. 27, 2012
Filed:
Jul. 10, 2009
Hitoshi Shimizu, Tokyo, JP;
Takeo Kageyama, Tokyo, JP;
Hitoshi Shimizu, Tokyo, JP;
Takeo Kageyama, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
To provide a surface emitting laser device including a substrate; an optical resonator arranged on the substrate, the optical resonator including a lower multilayer reflector and an upper multilayer reflector; a strained active layer arranged in the resonator, the strained active layer having a multiple quantum well structure formed with a quantum well layer and a barrier layer; and a current confinement layer arranged on an upper side of the strained active layer, the current confinement layer including a selectively oxidized portion, where the current confinement layer is arranged at a position where a strain in the selectively oxidized portion influences the strained active layer.