Abstract
Counter-phase modulation of WDM 24100 Gb/s DP-QPSK channels in a polarization-insensitive fiber-loop is demonstrated for low noise degenerate four-wave mixing with a CW pump. The OSNR is boosted by ≈9 dB enabling an average ≈4 dB Q2-factor improvement.
© 2015 Optical Society of America
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