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:
Sep. 14, 1999
Filed:
Aug. 28, 1997
Applicant:
Inventors:
Shoji Hirata, Kanagawa, JP;
Shiro Uchida, Kanagawa, JP;
Koji Iwamoto, Kanagawa, JP;
Hiroki Nagasaki, Kanagawa, JP;
Tsuyoshi Tojyo, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 46 ; 372 45 ;
Abstract
An AlGaInP-based buried-ridge semiconductor laser includes an n-type GaAs current blocking layer 8 buried in opposite sides of a ridge stripe portion 7 which is made of an upper-layer portion of a p-type AlGaInP cladding layer 4, p-type GaInP intermediate layer 5 and p-type GaAs contact layer 6. The ridge stripe portion 7 includes tapered regions 7a having the length of L1 at cavity-lengthwise opposite ends of the ridge stripe portion 7.