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US 2003/0151803 A1Published application
Method and system for controlling amplifier power in an optical communications network having add/drop capability
AssigneeCiena Corporation
InventorsJames E. DeGrange JR., Sridhar Balakrishnan
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Abstract
The invention includes a method for controlling amplifier output power in an optical communications network having channel add/drop capability. A first transmission parameter and a second transmission parameter are determined at a first amplifier. In an exemplary embodiment, the first transmission parameter is a composite express signal-to-noise ratio and the second transmission parameter is a composite signal-to-noise ratio. The total output power of a downstream amplifier is adjusted in response to the first transmission parameter and second transmission parameter. A system for implementing the method is also disclosed.
Claims30
A method of controlling amplifier output power in an optical communications network, the method comprising:
- for a first amplifier, determining a first transmission parameter associated with the output power of the first amplifier and a second transmission parameter associated with the output power of the first amplifier;
- for a second amplifier downstream from the first amplifier;
- determining a second signal output power for the second amplifier;
- determining an amount of amplified spontaneous emission generated at the second amplifier;
- and
- determining an output power for the second amplifier in response to the second signal output power, the first transmission parameter, the second transmission parameter and the amount of amplified spontaneous emission generated at the second amplifier;
- and
- controlling output power of the second amplifier in response to the determined output power for the second amplifier.
5 more elements
A method of controlling amplifier output power in an optical communications network, the method comprising:
- for a first amplifier:
- determining a first signal output power for the first amplifier;
- determining a composite express output power for the first amplifier;
- determining a composite output power for the first amplifier in response to added and blocked channels;
- determining a composite express signal-to-noise ratio in response to the first signal output power and the composite express output power;
- determining a composite signal-to-noise ratio in response to the first signal output power and the composite output power;
- for a second amplifier downstream from the first amplifier;
- determining a second signal output power for the second amplifier;
- determining an amount of amplified spontaneous emission generated at the second amplifier;
- and
- determining an output power for the second amplifier in response to the second signal output power, composite express signal-to-noise ratio, composite signal-to-noise ratio and the amount of amplified spontaneous emission generated at the second amplifier;
- and,
- controlling output power of the second amplifier in response to the determined output power for the second amplifier.
10 more elements
An optical communications network comprising:
- a first amplifier;
- a processor associated with said first amplifier, said processor associated with said first amplifier determining a first transmission parameter associated with the output power of the first amplifier and a second transmission parameter associated with the output power of the first amplifier;
- a second amplifier downstream from said first amplifier;
- a processor associated with said second amplifier, said processor associated with said second amplifier:
- determining a second signal output power for said second amplifier;
- determining an amount of amplified spontaneous emission generated at said second amplifier;
- and
- determining an output power for said second amplifier in response to the second signal output power, the first transmission parameter, the second transmission parameter and the amount of amplified spontaneous emission generated at said second amplifier;
- and
- controlling output power of said second amplifier in response to the determined output power for said second amplifier.
7 more elements
An optical communications network comprising:
- a first amplifier;
- a processor associated with said first amplifier, said processor associated with said first amplifier:
- determining a first signal output power for said first amplifier;
- determining a composite express output power for said first amplifier;
- determining a composite output power for said first amplifier in response to added and blocked channels;
- determining a composite express signal-to-noise ratio in response to the first signal output power and the composite express output power;
- determining a composite signal-to-noise ratio in response to the first signal output power and the composite output power;
- a second amplifier;
- a processor associated with said second amplifier, said processor associated with said second amplifier:
- determining a second signal output power for said second amplifier;
- determining an amount of amplified spontaneous emission generated at said second amplifier;
- and
- determining an output power for said second amplifier in response to the second signal output power, composite express signal-to-noise ratio, composite signal-to-noise ratio and the amount of amplified spontaneous emission generated at said second amplifier;
- and,
- controlling output power of said second amplifier in response to the determined output power for said second amplifier.
12 more elements
A method of determining amplifier power for an amplifier in an optical communications network, the method comprising:
- determining an amount of ASE power blocked at a network element upstream of the amplifier;
- and,
- determining output power for the amplifier in response to the amount of ASE power blocked at the network element upstream of the amplifier.
An optical communications network comprising:
- an amplifier;
- and
- a processor associated with said amplifier, said processor:
- determining an amount of ASE power blocked at a network element upstream of said amplifier;
- and,
- determining output power for said amplifier in response to the amount of ASE power blocked a +t the network element upstream of the amplifier.
3 more elements
Dependencies are inferred from the claim text.