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:
Feb. 17, 1987
Filed:
May. 21, 1984
Applicant:
Inventors:
Masaaki Ohshima, Yokohama, JP;
Michio Matsuki, Kanagawa, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 357 17 ; 372 46 ;
Abstract
A semiconductive laser comprises an active layer made in the shape of a crescent moon with the distribution of refractive index approximated by a quadratic curve. InGaAsP layers with a refractive index smaller than that of the active layer are disposed on both sides of the active layer.