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:
Apr. 05, 2011
Filed:
Jun. 04, 2007
Osamu Maeda, Kanagawa, JP;
Masaki Shiozaki, Kanagawa, JP;
Norihiko Yamaguchi, Kanagawa, JP;
Yoshinori Yamauchi, Tokyo, JP;
Osamu Maeda, Kanagawa, JP;
Masaki Shiozaki, Kanagawa, JP;
Norihiko Yamaguchi, Kanagawa, JP;
Yoshinori Yamauchi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A surface-emitting laser diode capable of being manufactured easily at low cost, and capable of stabilizing the polarization direction of laser light in one direction and achieving higher output is provided. A light emission sectionin which a lower first DBR mirror layer, a lower second DBR mirror layer, a lower spacer layer, an active layerincluding a light emission regionA, an upper spacer layer, a current confinement layer, an upper DBR mirror layerand a contact layerare laminated in this order is included on a substrate. The lower first DBR mirror layerincludes an oxidation sectionnonuniformly distributed in a direction rotating around the light emission regionA in a periphery of a region corresponding to the light emission regionA. The oxidation sectionincludes a pair of multilayer filmsand, and is formed by oxidizing a low refractive index layerA. Thereby, an anisotropic stress according to nonuniform distributions of the multilayer filmsandis generated in the active layer