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:
Dec. 20, 1994
Filed:
Apr. 11, 1994
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 46 ; 372 45 ;
Abstract
A semiconductor laser of a patterned-substrate type comprises the patterned-substrate having a sloped portion and a planar portion, and a plurality of semiconductor layers formed on the patterned-substrate including a heterostructure. By controlling condition for growing a specific semiconductor layer, a preferably ratio of a sloped portion thickness to a planar portion thickness of the semiconductor layer can be obtained, which enables a lasing current of the laser to be confined in a restricted region, and this results in obtaining a high efficiency and a high power output of the semiconductor laser.