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The performance improvement with digital backpropagation using PDM-8PSK and PDM-8QAM formats was experimentally assessed for 7×112Gbit/s. Transmission reach was extended by ∼20% compared to 15% for an equivalent PDM-QPSK system.
We demonstrate the performance of a fast switching (< 150ns) 112Gb/s DP-QPSK digital burst mode coherent receiver in a 24-channel WDM system. A penalty of 0.5dB is experienced after propagating over 240km of SSMF.
A widely tunable burst mode digital coherent receiver is implemented in a 112 Gb/s DP-QPSK WDM system. The receiver performance is validated in a 24-channel WDM test-bed using a commercially available DS-DBR laser as the local oscillator. It is demonstrated that the wavelength tunable laser can switch to any one of the 24-channels in less than 130 ns, thus enabling the dynamic reception of 5 s...
We report on ultra-long haul transmission of polarization-switched QPSK (PS-QPSK) and polarization-multiplexed BPSK (PM-BPSK) at 42.9Gbit/s per WDM channel. Although achieving similar transmission distances in excess of 13,600km, PS-QPSK offers a significant reduction in receiver complexity due to a lower symbol-rate.
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