Margin-based optimization systems and methods in optical networks by intentionally reducing margin

1. A method of optimizing capacity of an optical network, through intentionally reducing margin on one or more wavelengths, the method comprising:

identifying a first wavelength capable of using excess capacity;

determining the one or more wavelengths in the optical network separate from the first wavelength have extra margin by comparing one or more parameters associated with the one or more wavelengths to one or more predetermined thresholds;

adjusting at least one of the one or more wavelengths to reduce its associated margin from the extra margin to a nominal margin to increase supportable capacity of the first wavelength, wherein the adjusting comprises any changes to a signal associated with the at least one of the one or more wavelengths, and wherein the adjusting is based on a nonlinear optimization of the one or more wavelengths which comprises modeling modem bit rate, Optical Signal to Noise Ratio (OSNR), and whether or not a signal can support additional capacity as real functions in the nonlinear optimization; and

increasing capacity of the first wavelength based on the supportable capacity, wherein the adjusting and the increasing is based on excess margin in the optical network.

2. The method of claim 1 , wherein the adjusting utilizes any one of modifying average power, changing wavelength, changing modulation, and changing precompensation.

3. The method of claim 1 , wherein the one or more parameters are any of additive noise, Cross-Phase Modulation, Cross-Polarization Modulation, and spectral width.

4. The method of claim 1 , wherein the one or more parameters are measured by a modem associated with the one or more wavelengths.

5. The method of claim 1 , wherein the adjusting utilizes changing modulation to achieve any one of reduced nonlinear aggression, reduced spectral width, and changed spectral shape.

6. The method of claim 1 , wherein the adjusting is simulated in an application prior to operation on nodes in the optical network.

7. A controller for optimizing capacity of an optical network, through intentionally reducing margin on one or more wavelengths, the controller comprising

a processor communicatively coupled to a network interface; and

memory storing instructions that, when executed, cause the processor to

identify a first wavelength capable of using excess capacity,

determine the one or more wavelengths in the optical network separate from the first wavelength have extra margin based on a comparison of one or more parameters associated with the one or more wavelengths to one or more predetermined thresholds,

adjust the one or more wavelengths to reduce its associated margin from the extra margin to a nominal margin to increase supportable capacity of the first wavelength, wherein adjustments comprise any changes to a signal associated with the one or more wavelengths, and wherein the adjustments are based on a nonlinear optimization of the one or more wavelengths which comprises modeling modem bit rate, Optical Signal to Noise Ratio (OSNR), and whether or not a signal can support additional capacity as real functions in the nonlinear optimization, and

increase capacity of the first wavelength based on the supportable capacity, wherein the adjustments and the increase in the first wavelength's capacity is based on excess margin in the optical network.

8. The controller of claim 7 , wherein the one or more wavelengths are adjusted through any of modifying average power, changing wavelength, changing modulation, and changing precompensation.

9. The controller of claim 7 , wherein the one or more parameters are any of additive noise, Cross-Phase Modulation, Cross-Polarization Modulation, and spectral width.

10. The controller of claim 7 , wherein the one or more parameters are measured by a modem associated with the one or more wavelengths.

11. The controller of claim 7 , wherein the one or more wavelengths are adjusted by changing modulation to any of reduce nonlinear aggression, reduce spectral width, and change spectral shape.

12. The controller of claim 7 , wherein the adjusting is simulated in an application prior to operation on nodes in the optical network.

13. The controller of claim 7 , wherein the controller is a Software Defined Networking (SDN) controller.

14. An optical network, comprising:

a plurality of nodes interconnected by a plurality of links; and

a controller communicatively coupled to one or more of the plurality of nodes, wherein the controller is configured to

identify a first wavelength capable of using excess capacity,

determine the one or more wavelengths have extra margin based on a comparison of one or more parameters associated with the one or more wavelengths to one or more predetermined thresholds,

adjust the one or more wavelengths which do not include the first wavelength in the optical network to reduce its associated margin from the extra margin to a nominal margin to increase supportable capacity of the first wavelength, wherein adjustments comprise any changes to a signal associated with the one or more wavelengths, and wherein the adjustments are based on a nonlinear optimization of the one or more wavelengths which comprises modeling modem bit rate, Optical Signal to Noise Ratio (OSNR), and whether or not a signal can support additional capacity as real functions in the nonlinear optimization, and

increase capacity of the first wavelength based on the supportable capacity, wherein the adjustments and the increase in the first wavelength's capacity is based on excess margin in the optical network.

15. The optical network of claim 14 , wherein the controller is a Software Defined Networking (SDN) controller.