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:
Jun. 06, 2006
Filed:
Nov. 02, 2001
Ryo Yamada, Tokyo, JP;
Soichiro Araki, Tokyo, JP;
Yoshihiko Suemura, Tokyo, JP;
Yoshiharu Maeno, Tokyo, JP;
Itaru Nishioka, Tokyo, JP;
Atsushi Iwata, Tokyo, JP;
Ryo Yamada, Tokyo, JP;
Soichiro Araki, Tokyo, JP;
Yoshihiko Suemura, Tokyo, JP;
Yoshiharu Maeno, Tokyo, JP;
Itaru Nishioka, Tokyo, JP;
Atsushi Iwata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical cross-connecting device is small in scale of a switch even when a wavelength multiplexed signal to be transmitted through an optical fiber is high density and wide range. Switching of the wavelength multiplexed signals is performed in a first optical switch, switching per wavelength group in a second optical switch is performed for only signals required switching for smaller granularity, and switching per wavelength signals in a third optical switch is performed for only signals required switching for smaller granularity to from the opticall cross-connecting device. By this, even when the wavelength multiplexed signal to be transmitted through the optical fiber is high density and wide band, the optical cross-connecting device can be small in scale of a switch.