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:
Jul. 23, 2013
Filed:
Mar. 30, 2011
Hitoshi Shimizu, Tokyo, JP;
Takeo Kageyama, Kanagawa, JP;
Keishi Takaki, Tokyo, JP;
Norihiro Iwai, Tokyo, JP;
Hitoshi Shimizu, Tokyo, JP;
Takeo Kageyama, Kanagawa, JP;
Keishi Takaki, Tokyo, JP;
Norihiro Iwai, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A surface emitting laser is formed of a composition in which bandgap energy of layers from immediately above a current confinement layer to a second conductivity type contact layer is reduced towards the second conductivity type contact layer in a stacking direction, and a composition in which bandgap energy of layers from immediately below the current confinement layer to a first conductivity type contact layer is reduced towards the first conductivity type contact layer in a stacking direction while bypassing a quantum well layer or a quantum dot of an active layer, and includes a second conductivity type cladding layer including a material for reducing the mobility of carriers.