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. 22, 2015
Filed:
Nov. 05, 2012
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventor:
Nobuhiko Kikuchi, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q 11/00 (2006.01); H04J 14/02 (2006.01);
U.S. Cl.
CPC ...
H04Q 11/0005 (2013.01); H04J 14/02 (2013.01); H04J 14/0212 (2013.01); H04J 14/0267 (2013.01); H04Q 11/0067 (2013.01); H04Q 2011/0015 (2013.01); H04Q 2011/0016 (2013.01);
Abstract
Provided is a wavelength division multiplexing (WDM) optical transmission device which is suitable of performing splitting, wavelength multiplexing, switching, and routing on an optical WDM signal in which optical signals having a spectrum close to a rectangle are arranged with a high density, and efficiency of spectral usage is ultimately high in units of wavelengths. A WDM optical transmission device according to the present invention is configured to cause flat portions of adjacent transmission bands on a wavelength spectrum overlap each other.