Protection architecture for photonic switch using tunable...

Details Protection architecture for photonic switch using tunable... Protection architecture for photonic switch using tunable...

2008-06-17

2008-06-17

Pascal, Leslie (Department: 2613)

Optical communications

Fault recovery

Wdm

C398S068000, C398S048000

Reexamination Certificate

active

07389043

ABSTRACT:
A method and a protection switching arrangement for protection switching of any one of a plurality of optical signals of a multi-wavelength optical signal from the failure of an optical component is provided. The multi-wavelength optical signal which contains the optical signals is itself rerouted by the use of wavelength agnostic rerouting elements, after which a tunable optical filter is used to obtain from the multi-wavelength optical signal the particular optical signal which would have been affected by the failure. In embodiments of the invention where the failed component is a switching fabric, the multi-wavelength optical signal is rerouted away from the failed switching fabric through a redundant switching fabric after which the particular optical signal is obtained with use of the tunable optical filter.

REFERENCES:
patent: 7146102 (2006-12-01), Nishi et al.
patent: 7221429 (2007-05-01), Cavanaugh et al.
patent: 2002/0044322 (2002-04-01), Blumenthal et al.
patent: 2003/0007722 (2003-01-01), Caroli et al.
patent: 2003/0185566 (2003-10-01), Nishi et al.

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