Fiber input power selection for probabilistically shaped signals in optical networks
First Claim
1. A method for setting fiber input power in an optical transport network, comprising:
- determining, dependent on a target distance for an optical transmission path in the optical transport network, an initial modulation format for the optical transmission path, the initial modulation format representing a uniform distribution quadrature amplitude modulation (QAM) format selected from among a plurality of QAM modulation formats supported in the optical transport network, the initial modulation format being associated with a first fiber input power and a first spectral efficiency;
configuring one or more optical transponders to apply probabilistic shaping to the initial modulation format when transmitting traffic over the optical transmission path, the traffic comprising probabilistically shaped signals associated with a second spectral efficiency;
determining, dependent on the second spectral efficiency, a second fiber input power different from the first fiber input power; and
configuring one or more optical amplifiers along the optical transmission path to transmit the traffic comprising the probabilistically shaped signals over the optical transmission path using the second fiber input power.
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Accused Products
Abstract
Systems and methods for setting fiber input power for an optical transmission path may include determining an initial modulation format representing a uniform distribution QAM format, the initial modulation format associated with a first fiber input power and a first spectral efficiency, configuring optical transponders to apply probabilistic shaping to the initial modulation format when transmitting traffic over the optical transmission path, the traffic including probabilistically shaped signals with a second spectral efficiency, determining, dependent on the second spectral efficiency, a second fiber input power, and configuring optical amplifiers along the optical transmission path to transmit the traffic comprising the probabilistically shaped signals over the optical transmission path using the second fiber input power. Determining the second fiber input power may include incrementally increasing or decreasing an optimum fiber input power for a reference modulation format or applying an adaptive selection process to dynamically select the second fiber input power.
16 Citations
20 Claims
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1. A method for setting fiber input power in an optical transport network, comprising:
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determining, dependent on a target distance for an optical transmission path in the optical transport network, an initial modulation format for the optical transmission path, the initial modulation format representing a uniform distribution quadrature amplitude modulation (QAM) format selected from among a plurality of QAM modulation formats supported in the optical transport network, the initial modulation format being associated with a first fiber input power and a first spectral efficiency; configuring one or more optical transponders to apply probabilistic shaping to the initial modulation format when transmitting traffic over the optical transmission path, the traffic comprising probabilistically shaped signals associated with a second spectral efficiency; determining, dependent on the second spectral efficiency, a second fiber input power different from the first fiber input power; and configuring one or more optical amplifiers along the optical transmission path to transmit the traffic comprising the probabilistically shaped signals over the optical transmission path using the second fiber input power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical transport network for constellation shaping of quadrature amplitude modulation (QAM) formats, the optical transport network comprising:
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an optical transmission path; a plurality of transponders, each operable to apply probabilistic shaping to QAM modulation formats; one or more optical amplifiers along the optical transmission path; and a network management system configured to; determine, dependent on a target distance for the optical transmission path, an initial modulation format for the optical transmission path, the initial modulation format representing a uniform distribution QAM modulation format selected from among a plurality of QAM modulation formats supported in the optical transport network, the initial modulation format being associated with a first fiber input power and a first spectral efficiency; configure the one or more optical transponders to apply probabilistic shaping to the initial modulation format when transmitting traffic over the optical transmission path, the traffic comprising probabilistically shaped signals associated with a second spectral efficiency; determine, dependent on the second spectral efficiency, a second fiber input power different from the first fiber input power; and configure the one or more optical amplifiers along the optical transmission path to transmit the traffic comprising the probabilistically shaped signals over the optical transmission path using the second fiber input power. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification