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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