Abstract
We investigate the transmission performance of 5×112-Gb/s super-Nyquist PDM-QPSK over unrepeatered Raman-amplified link. All the results show that the optimum signal launch power is ~2dB lower for WDM than for single carrier transmission over 200-km unrepeatered Raman-amplified SSMF.
© 2017 Optical Society of America
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