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. 23, 2010
Filed:
May. 14, 2008
Yuichiro Hori, Kawasaki, JP;
Yuichiro Hori, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A surface emitting laser device can further improve the light emission efficiency thereof to enlarge the degree of freedom of the device. The surface emitting laser device includes an active layer, a photonic crystal layer disposed to be adjacent to the active layer, an electrodedisposed on the photonic crystal layer, and a plurality of light emitting regions regulated by the electrode. The photonic crystal layer is configured to include a first photonic crystal regiondisposed just under the electrode, and having a periodic refractive index structure for resonance of light within a plane, and a second photonic crystal regiondisposed just under the light emitting region, and having a periodic refractive index structure for emitting light in a direction perpendicular to the plane.