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:
Dec. 08, 1998
Filed:
Aug. 26, 1996
Applicant:
Inventor:
Hiroyuki Rokugawa, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 38 ; 372 50 ; 372 26 ; 372 29 ; 257 81 ; 385 88 ; 385 92 ;
Abstract
A semiconductor light source for an optical transmitter which includes at least one DC supply unit and at least one AC supply unit, comprises a DC signal source connected to the DC supply unit in order to supply a drive signal thereto; and an AC signal source connected to the AC supply unit in order to supply a control signal thereto; wherein turning on or off an optical output by the semiconductor light source is controlled by using a control signal having the same electric polarity as the drive signal.