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. 12, 1991
Filed:
Jan. 31, 1991
Hideo Kawano, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A transverse mode stabilized AlGaInP visible light laser diode in accordance with the present invention has a characteristic in that, instead of forming a built-in refractive index distribution in an active layer along a junction plane by means of the absorption loss of the oscillated light in the conventional transverse mode stabilized AlGaInP laser diodes, an optical guide layer having a ridge stripe portion is formed on the active layer, and a refractive index distribution is formed by the thickness difference of the optical guide layer. In particular, the present laser diode employs as the current blocking layer to be formed on the sides of the mesa, an Al.sub.x Ga.sub.1-x As layer which does not give rise to an absorption loss of the oscillated light.