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:
Aug. 20, 1991
Filed:
Mar. 06, 1990
Applicant:
Inventors:
Misuzu Sagawa, Dublin, IE;
Takashi Kajimura, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 50 ; 372 45 ; 372 46 ;
Abstract
A semiconductor laser device including a plurality of oscillation stripes so that phase locked oscillation can be generated at adjacent oscillation stripes is disclosed, in which device dummy regions for transmitting a current uncontributive to laser oscillation are arranged on both sides of an oscillation stripe region containing the oscillation stripes.