US Patent 7522837 Optical communication system
Patent 7522837 was granted and assigned to Nippon Telegraph and Telephone on April, 2009 by the United States Patent and Trademark Office.
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An optical communication system is constructed which enables highly reliable and flexible connection to communication nodes connected to a path establishment circuit, by utilizing wavelength-routing characteristics of a path establishment circuit such as an arrayed waveguide grating. The optical communication system has multiple communication nodes having a signal output port and signal input port pair, and a path establishment circuit having multiple optical input ports and multiple optical output ports which are set so that optical signals input from the respective optical input ports are output to predetermined optical output ports corresponding to the wavelengths of the optical signals.
US Patent 07522837 Optical communication system US Patent 7522837 Optical communication system
US Patent 07522837 Optical communication system
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