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

Abstract

In this work we experimentally demonstrate 200 Gb•s −1 (2 × 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 ® SMF-28 ® ULL fiber (the average attenuation of the spools used in this experiment ~0.160 dB km −1 ), and optimization of remotely pumped optical amplifiers, bidirectional Raman amplifiers, and dispersion precompensation.

An Optimal Framework for WDM Systems Using Analytical Characterization of Refractive Index-Related Nonlinear Impairments

“…The relative group delay analysis performed in [39] shows a maximum of 430 psec value, which can easily be compensated using a larger frame size during the transmission. The 13.3 dB OSNR achieved in [40] after 500 km transmission through a low loss fiber justifies our BER results and received eye diagram, as explained in the next paragraph.…”

“…Thus, the work presented in this paper is of considerable importance, as it provides lower BER rates for 500 km transmission, 32 channels and 12.5 GHz channel spacing. Comparing the obtained results with the experimental study of data transmission over 500 km of fiber transmission [37][38][39][40], the use of DSP for interference mitigation and compensation of non-linear effects allows one to increase the number of channels from four [37] to thirty-two channels. Similar results have been achieved as [38] without the use of polarization multiplexing, which reduces the complexity of our proposed system.…”

Trends in the Development of Backbone Optical Communication Systems

“…Применение распределенных усилителей и усилителей с удаленной накачкой позволяет существенно увеличить дальность работы однопролетных и многопролетных ВОЛС [24][25][26][27]. Для снижения уровня шума и, соответственно, повышения качества передаваемого сигнала (качествопараметр оптического сигнала, пропорциональный отношению сигналшум), желательно обеспечить такой режим распространения сигнала по линии связи, когда мощность сигнала вдоль линии изменяется минимально.…”