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:
Sep. 12, 1995
Filed:
Sep. 09, 1994
Applicant:
Inventor:
Tetsuro Okuda, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 50 ; 372 20 ; 372 96 ;
Abstract
A semiconductor distributed feedback laser emitting device has upper electrodes arranged in a longitudinal direction of an oscillator for supplying current to the oscillator, and a separating electrode is provided between the upper electrodes for making the distribution of an electric field strength in the longitudinal direction uniform by changing the current density in the separating electrode with respect to the current density in the upper electrodes, thereby improving a second intermodulation distortion.