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In this paper, we experimentally investigate the tolerance of 111-Gb/s polarization multiplexed return-to-zero differential quadrature phase-shift keying (POLMUX-RZ-DQPSK) signals with respect to nonlinear impairments in a link with either (inline) optical or (receiver-side) electrical dispersion compensation. After transmission of more than 2000 km of LEAF, a comparable nonlinear tolerance is observed...
Unrepeatered distributed Raman link with ROPA combining 22times10.7Gb/s and 3times43Gb/s NRZ DPSK signals in L-band is demonstrated. The net span loss was 80 dB over 451 km of ldquolegacyrdquo G.654 fiber.
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