Dynamic Spectral Equalization in Ladder Protected Optical Networks
AssigneeCiena Corporation
InventorsKevan Peter Jones, Veronique Talon, Mark R. Hinds
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Abstract
A dynamic equalization method is implemented in a downstream intermediate line amplifier (ILA) node that include an ILA and a trunk protection switch (TPS) connected to a plurality of paths, each forming a rung in a ladder protection scheme. The dynamic equalization method includes steps of detecting a switch between a first path and a second path of the plurality of paths; compensating for any loss difference between the first path and the second path; and equalizing any optical spectrum differences between the first path and the second path.
Claims20
A downstream intermediate line amplifier (ILA) node comprising:
- an ILA and a trunk protection switch (TPS) connected to a plurality of paths, each forming a rung in a ladder protection scheme;
- and
- a controller configured to
- detect a switch between a first path and a second path of the plurality of paths,
- cause compensation for any loss difference between the first path and the second path, and
- cause equalization of any optical spectrum differences between the first path and the second path.
A dynamic equalization method implemented in a downstream intermediate line amplifier (ILA) node comprising an ILA and a trunk protection switch (TPS) connected to a plurality of paths, each forming a rung in a ladder protection scheme, the dynamic equalization method comprising steps of:
- detecting a switch between a first path and a second path of the plurality of paths;
- compensating for any loss difference between the first path and the second path;
- and
- equalizing any optical spectrum differences between the first path and the second path.
A ladder optical network comprising:
- a first terminal node and a second terminal node;
- one or more intermediate line amplifier (ILA) nodes interconnecting the first terminal node and the second terminal node, using a ladder protection scheme,
- wherein each of the one or more ILA nodes includes an ILA and two protection switches (TPSs) on either side of the ILA, each TPS of the TPSs connect connected to a plurality of paths, each forming a rung in a ladder protection scheme, and
- wherein each of the one or more ILA nodes is configured to
- detect a switch between a first path and a second path of the plurality of paths,
- compensate for any loss difference between the first path and the second path, and equalize any optical spectrum differences between the first path and the second path.
Dependencies are inferred from the claim text.