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:
Apr. 21, 2009
Filed:
Nov. 19, 2003
Hiromasa Tanobe, Tokyo, JP;
Akira Okada, Tokyo, JP;
Morito Matsuoka, Atsugi, JP;
Kazuto Noguchi, Atsugi, JP;
Takashi Sakamoto, Zama, JP;
Osamu Moriwaki, Zama, JP;
Hiromasa Tanobe, Tokyo, JP;
Akira Okada, Tokyo, JP;
Morito Matsuoka, Atsugi, JP;
Kazuto Noguchi, Atsugi, JP;
Takashi Sakamoto, Zama, JP;
Osamu Moriwaki, Zama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
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.