Abstract
Optical fiber transmission is impacted by linear and nonlinear impairments.
We study the use of digital backpropagation (BP) in conjunction with coherent
detection to jointly mitigate dispersion and fiber nonlinearity. We propose
a noniterative asymmetric split-step Fourier method (SSFM) for solving the
inverse nonlinear Schrödinger equation (NLSE). Using simulation results
for RZ-QPSK transmitted over terrestrial systems with inline amplification
and dispersion compensation, we obtain heuristics for the step size and sampling
rate requirements, as well as the optimal dispersion map.
© 2008 IEEE
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