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. 26, 2011
Filed:
Nov. 19, 2007
Yuichi Akiyama, Kawasaki, JP;
Takafumi Terahara, Kawasaki, JP;
Hiroki Ooi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optimally-sized optical cross-connect that switches optical signal paths with a minimum number of wavelength selective switches and their interconnections. To switch optical signals of N routes (N=1, 2, . . . ), an optical cross-connect includes a 2×N (2-input, N-output) wavelength selective switch for each of N input routes and a N×2 (N-input, 2-output) wavelength selective switch for each of N output routes. One input port of each 2×N wavelength selective switch receives an optical signal from a corresponding input route, while the other input port of the same receives an optical add signal from a corresponding add route. One output port of each N×2 wavelength selective switch outputs an optical signal to a corresponding output route, while the other output port outputs an optical drop signal to a corresponding drop route.