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. 13, 2010
Filed:
Feb. 14, 2008
Kimio Shigihara, Tokyo, JP;
Kimio Shigihara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A semiconductor laser apparatus can improve electric conversion efficiency to a satisfactory extent. The apparatus includes an n-type cladding layer, an n-type cladding layer side guide layer, an active layer, a p-type cladding layer side guide layer, and a p-type cladding layer, wherein electrons and holes are injected into the active layer, transverse to the active layer, through the n-type cladding layer side guide layer and the p-type cladding layer side guide layer. The p-type cladding layer side guide layer is thinner than the n-type cladding layer side guide layer to position the active layer closer to the p-type cladding layer, and, at the same time, the refractive index of the p-type cladding layer side guide layer is higher than the refractive index of the n-type cladding layer side guide layer.