Abstract
We compare the transmission performance of 112-Gb/s POLMUX-QPSK modulation over large-A(eff) Pure-Silica core fiber and SSMF using EDFA-only amplification. The higher nonlinear threshold of the large-A(eff) Pure-Silica core fiber allows for a 55% increase in transmission distance. By using back-propagation an additional 10% increase is observed. In case spans with equal length for both fiber types and two splices per span only would have been used, resulting in a lower span loss for the large-A(eff) Pure-Silica core fiber, the total increase grows to 85%.
Highlights
The rapid increase in popularity of very bandwidth-intensive applications such as internet video, cloud storage and social networking requires large volumes of data to be transmitted over long distances
In case spans with equal length for both fiber types and two splices per span only would have been used, resulting in a lower span loss for the large-Aeff Pure-Silica core fiber, the total increase grows to 85%
The transmission link consists of a re-circulating loop (Fig. 1(b)) containing a LoopSynchronized Polarization Scrambler (LSPS), four fiber spans followed by an EDFA to compensate the losses, and a wavelength selective switch (WSS)
Summary
The rapid increase in popularity of very bandwidth-intensive applications such as internet video, cloud storage and social networking requires large volumes of data to be transmitted over long distances This has fuelled the historically exponential growth of data traffic volumes in the worldwide telecommunication network, and based on current trends it is likely to continue to drive an unsurpassed need for transmission capacity over the decade. Polarization-multiplexed quadrature phase shift keying (POLMUX-QPSK) [2] has emerged in recent years as the most suitable modulation format for 100G line rates, as it is compatible with the standardized 50-GHz channel spacing This allows for a spectral efficiency of 2.0 b/s/Hz, scaling C-band only transmission systems to a total capacity of up to 10 Tb/s. This would result in a total increase in transmission distance of 85% by using LA-PSCF instead of SSMF
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