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. 28, 1984
Filed:
Mar. 30, 1981
Applicant:
Inventors:
Isamu Sakuma, Tokyo, JP;
Katsuhiko Nishida, Tokyo, JP;
Hideo Kawano, Tokyo, JP;
Masayasu Ueno, Tokyo, JP;
Yoshishige Matsumoto, Tokyo, JP;
Shohei Matsumoto, Tokyo, JP;
Takao Furuse, Tokyo, JP;
Assignee:
Nippon Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 48 ; 357 17 ; 372 45 ;
Abstract
A semiconductor laser of the rib guide type having the thickness of an active layer within a stripe-shaped region thicker than that of the outside, and thus the stripe-shaped region is made to have a waveguide action and, thereby, fundamental mode laser may be achieved.