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. 27, 1988
Filed:
Dec. 17, 1985
Applicant:
Inventors:
Toshitami Hara, Tokyo, JP;
Yoshinobu Sekiguchi, Kawasaki, JP;
Seiichi Miyazawa, Kawasaki, JP;
Hidetoshi Nojiri, Matsudo, JP;
Akira Shimizu, Tokyo, JP;
Isao Hakamada, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 357-4 ; 357 17 ;
Abstract
There is disclosed a semiconductor laser having a super lattice structure near an active layer, in which the super lattice structure consists of at least two types of materials which have different bandgaps, the materials are regularly and alternately arranged, and thickness of adjacent layers of the materials change such that a ratio of the thicknesses changes within the super lattice structure toward an active layer.