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:
Jul. 17, 2007
Filed:
Jun. 23, 2004
Applicant:
Tomoto Tanaka, Yokohama, JP;
Inventor:
Tomoto Tanaka, Yokohama, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 4/00 (2006.01); H04B 10/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
An amplification medium is inputted thereto first lights and second lights, polarizations of which are orthogonal. A pumping means inputs first pump lights coinciding with the polarization of the first lights, and second pump lights coinciding with the polarization of the second lights to the amplification medium. The gain of a wavelength or wavelength band of a certain light can be efficiently controlled, simply and independently, without affecting the other wavelengths or wavelength bands.