500 km unrepeatered 200 Gbit.s(-1) transmission over a G.652-compliant ultra-low loss fiber only

摘要

In this work we experimentally demonstrate 200 Gb.s(-1) (2 x 100 G) unrepeatered transmission over 502.1 km using a dual polarization quadrature phase-shift-keyed (DP-QPSK) format and real-time processing. Such ultra-long distance is enabled by the use of high-performance 100 G DP-QPSK transponders (the required optical signal-to-noise ratio is 12 dB), Corning (R) SMF-28 (R) ULL fiber (the average attenuation of the spools used in this experiment similar to 0.160 dB km(-1)), and optimization of remotely pumped optical amplifiers, bidirectional Raman amplifiers, and dispersion precompensation.