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:
Nov. 20, 2007
Filed:
Feb. 13, 2004
Hiromasa Tanobe, Tokyo, JP;
Akira Okada, Tokyo, JP;
Kazuto Noguchi, Atsugi, JP;
Morito Matsuoka, Atsugi, JP;
Takashi Sakamoto, Zama, JP;
Osamu Moriwaki, Zama, JP;
Hiromasa Tanobe, Tokyo, JP;
Akira Okada, Tokyo, JP;
Kazuto Noguchi, Atsugi, JP;
Morito Matsuoka, Atsugi, JP;
Takashi Sakamoto, Zama, JP;
Osamu Moriwaki, Zama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A fiber optic communication system includes a device of switching and setting wavelength of optical signals used in communication by network-node equipments, which sets the mapping of the wavelength of the optical signal used in communication by the network node equipments, and the input/output ports of an array waveguide grating (AWG), so as to construct a predetermined logical network topology by a plurality of network node equipments which are connected via optical fibers to the array waveguide grating that outputs optical signals inputted to optical input ports, to predetermined optical output ports in accordance with the wavelength thereof. As well as enabling a simple construction, it is easy to realize flexible network design, construction, and operation, and different network groups can also be easily connected to each other. Moreover, a fiber optic communication system having robust security and which can be stably operated even at the time of failure is realized at low cost.