Stackable WDM arrangement

Details Stackable WDM arrangement Stackable WDM arrangement

2007-08-07

2007-08-07

Singh, Dalzid (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S083000

Reexamination Certificate

active

10008507

ABSTRACT:
A module that includes both an “add-in”/“drop-out” pair of ports and a “drop-in”/“add-out” pair of ports comprises an arrangement of elements that combines an optical signal having a chosen wavelength with an optical signal applied at the “add-in” port, and outputs the combined signal at the “add-out port.” Concurrently, the module extracts an optical signal with the same wavelength from an optical signal applied at the “drop-in” port signal, yielding an optical signal at the “drop-out” port that is missing that same wavelength. When the amount of information that needs to be sent from a first network node to a second, remote, node, is greater than that which a single wavelength can handle, a plurality of the above-described modules are interconnected within the first node by optically coupling the “add” ports in a “daisy chain” fashion and the “drop” ports in a “daisy chain” fashion, with each module operating at a different wavelength.

REFERENCES:
patent: 6091869 (2000-07-01), Sundelin
patent: 6208443 (2001-03-01), Liu et al.
patent: 6542660 (2003-04-01), Medin et al.
patent: 6728486 (2004-04-01), Hutchison et al.

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