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:
Nov. 10, 2015
Filed:
Nov. 06, 2014
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Toru Takayama, Nara, JP;
Abstract
In a semiconductor light-emitting element, a first cladding layer in a first conductive type, a quantum well active layer, and a second cladding layer in a second conductive type are stacked on a semiconductor substrate in this order. A ridge-shaped stripe formed at the second cladding layer forms a waveguide. Rf<Rr and Wf>Wr are satisfied, where the width of the ridge-shaped stripe at a front end face from which laser light is output is represented by Wf, the width of the ridge-shaped stripe at a rear end face is represented by Wr, the reflectance of the front end face is represented by Rf, and the reflectance of the rear end face is represented by Rr. Light in a fundamental transverse mode, a first high-order transverse mode, a second high-order transverse mode, and a third high-order transverse mode is guided in the waveguide.