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:
Oct. 27, 1981
Filed:
Oct. 09, 1979
Applicant:
Inventors:
Izuo Hayashi, Tokyo, JP;
Hiroo Yonezu, Tokyo, JP;
Assignee:
Nippon Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
331 / ;
Abstract
A semiconductor laser having a double heterostructure configuration is provided with a light waveguide layer extending between a pair of mirrors. A thin active layer is disposed adjacent to the waveguide layer, and is formed in the shape of a stripe having a width of approximately 5 .mu.m. The stripe is shorter in axial length than the waveguide, such that the ends of the stripe are spaced from the mirrors by a distance of 30 to 60 .mu.m.