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We experimentally demonstrate, for the first time to the best of our knowledge, an ultralong-haul dense wavelength division multiplexed transmission of 96 × 100Gb/s coherent polarization multiplexed quadrature phase-shifted keying transponders over ITU-T G.655 nonzero dispersion-shifted large effective area fibers (NZ-DSF) with an effective core area of 72 μm ² , employing both commercial erbium-doped fiber amplifiers (EDFA) and hybrid EDFA + Raman amplification systems. Using the state-of-the-art digital pulse shaping and digital preemphasis algorithms, we report ~1.5dB back-toback optical signal-to-noise ratio penalty at pre forward error correction (FEC) bit error rate (BER) threshold (3.8 × 10 ^-2 ), with respect to theoretical performance. In particular, we demonstrate ~6500km transmission across the entire C-band, at pre-FEC BER of 3.8 × 10 ^-2 , employing EDFA + backward Raman amplification-where …