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:
Jun. 13, 1990
Iwao Komazaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Current blocking layers are provided on whole both side surfaces of a mesa stripe structure to control a transverse mode of light in active and window sections. In a longitudinal direction of a laser cavity, an active layer and optical guiding layers are coupled by taper like optical waveguides. As a result, a low loss coupling and a high optical radiation power are obtained in a self-alignment type window semiconductor laser according to the invention. Further, a wafer surface is flatted, after the regrowth of the window sections, so that the window sections and an active section are simultaneously processed in regard to an optical transverse mode. As a result, a fabricating process is simplified in the invention.