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:
Apr. 28, 1987
Filed:
Oct. 03, 1984
Applicant:
Inventors:
Noriyuki Hirayama, Kawasaki, JP;
Masaaki Ohshima, Yokohama, JP;
Naoki Takenaka, Kawasaki, JP;
Yoshihiro Kino, Kawasaki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 372 46 ; 357 17 ;
Abstract
A semiconductor laser comprising in the direction parallel to a junction on both sides of a stripe-shaped active layer of double-hetero structure a semi-insulating current blocking layer which has a refractive index smaller than that of the active layer and of which the resistance is increased by doping of an impurity.