Optical cross-connect using wavelength selective switches

Details Optical cross-connect using wavelength selective switches Optical cross-connect using wavelength selective switches

2011-04-26

2011-04-26

Singh, Dalzid (Department: 2613)

Optical communications

Multiplex

Optical switching

C398S048000, C398S049000

Reexamination Certificate

active

07933519

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.

REFERENCES:
patent: 2002/0186434 (2002-12-01), Roorda et al.
patent: 2005/0226551 (2005-10-01), Pichler et al.
Patent Abstracts of Japan, Publication No. 2004-343231, published Dec. 2, 2004 (1 page).

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