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US 9,071,356 B2Granted
Method for the compensation of nonlinear impairments in dispersion-managed optical fiber links using phase conjugation and equivalent optical link
AssigneeNEC Laboratories America, Inc.
InventorsEduardo Mateo, Yoshiaki Aono
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Abstract
A method for nonlinearity compensation for an optical transmission link includes determining a dispersion effect of a transmission link; applying a phase conjugation to the transmission link, the phase conjugation responsive to an input wave over the transmission link and providing a conjugated version of the input wave; and configuring an optimum equivalent link responsive to the phase conjugation after the transmission link to compensate for a non-linear dispersion effect from said transmission link.
Claims5
A method for nonlinearity compensation for an optical transmission link comprising the steps of:
- determining a dispersion effect of a transmission link;
- applying a phase conjugation to the transmission link, said phase conjugation responsive to an input wave over said transmission link and providing a conjugated version of said input wave;
- and
- configuring an optimum equivalent link responsive to said phase conjugation after said transmission link to compensate for a non-linear dispersion effect from said transmission link;
- wherein said equivalent link comprises a configuration responsive to
- Γ=∫0Ld(1)exp[iγ1(z)P1(z)z]dz−∫0Ld(2)exp[iγ2(z)P2(z)z]dz
- where Γ denotes an equivalence factor, Ld(1) denotes a dispersion length of said transmission link, Ld(2) denotes a dispersion length of said equivalent link, γ1 denotes a nonlinear parameter of said transmission link;
- γ2 denotes a nonlinear parameter of said equivalent link, P1(z) denotes a power evolution of said transmission link, and P2(z) denotes a power evolution of said equivalent link.
5 more elements
Dependencies are inferred from the claim text.