We revisit the problem of estimating the nonlinear channel capacity of fiber-optic systems. By taking advantage of the fact that a large fraction of the nonlinear interference between different wavelength-division-multiplexed channels manifests itself as phase noise, and by accounting for the long temporal correlations of this noise, we show that the capacity is notably higher than what is currently assumed. This advantage translates into nearly doubling of the link distance for a fixed transmission rate.
© 2014 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: November 8, 2013
Revised Manuscript: December 5, 2013
Manuscript Accepted: December 6, 2013
Published: January 15, 2014
Ronen Dar, Mark Shtaif, and Meir Feder, "New bounds on the capacity of the nonlinear fiber-optic channel," Opt. Lett. 39, 398-401 (2014)