Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tsukasa Takahashi0
Date of Patent
August 3, 2010
Patent Application Number
11598129
Date Filed
November 13, 2006
Patent Primary Examiner
Patent abstract
In an optical transmission network of the present invention, an optical signal output from a CWDM unit is combined on an optical transmission path of a DWDM network via a multiplexing filter arranged on a light output terminal of a DWDM unit adjacent to the CWDM unit. Furthermore, an optical signal propagated on an optical transmission path is branched from the DWDM light by a de-multiplexing filter provided on a light input terminal of an adjacent DWDM unit, and applied to a CWDM unit adjacent to the DWDM unit. As a result, it is possible to mutually connect a plurality of CWDM networks, using an optical transmission path of a DWDM network, and it is possible to realize a longer distance for CWDM networks.
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