Abstract
We demonstrate that the transmission BER, OSNR penalty, and system margin can be accurately
predicted for multiple fiber types using the back-to-back response together with the Gaussian
Noise model of nonlinear penalties. We first experimentally quantify the 1600 km link performance
of SMF, MDF, and LAF fiber types in a coherent, WDM PDM-QPSK system at both 28 and 32 GBaud
employing all-EDFA amplification and nearly identical span lengths to isolate fiber performance
effects. We quantify the BER, OSNR transmission penalty, and link margin versus per-channel launch
power in both linear and nonlinear transmission regimes. We demonstrate that the total system
performance can be directly and accurately predicted using the fiber parameters
${\alpha}, D$
, and
${\gamma}$
, the number spans and noise figures, and back-to-back performance of the
transmitter–receiver pair. We also show that the system margins scale as
$({\alpha} \vert D\vert/{\gamma}^{2})$
$^{1/3}$
as predicted by the Gaussian Noise model of nonlinear penalties in uncompensated
systems.
© 2013 IEEE
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