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:
May. 09, 2000
Filed:
Dec. 07, 1998
Applicant:
Inventors:
Kazuo Yamane, Kawasaki, JP;
Michikazu Shima, Kawasaki, JP;
Yumiko Kawasaki, Kawasaki, JP;
Kenji Tagawa, Kawasaki, JP;
Shinya Inagaki, Kawasaki, JP;
Norifumi Shukunami, Sapporo, JP;
Assignee:
Fujitsu Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ; G02B / ;
U.S. Cl.
CPC ...
359345 ; 359337 ; 359341 ; 372-6 ; 372 70 ;
Abstract
An optical amplifier amplifies a wavelength-division-multiplexed optical input signal composed of optical signals having different wavelengths such that the output level of each of the optical signal is always optimized and such that the difference between the gains of the amplifier on the optical signals is minimized when the number of optical signals is two. The output level of the amplifier is controlled according to the number of the optical signals, to optimize the output level of each of the optical signals.