We develop an analytical theory which allows us to identify the information spectral density
limits of multimode optical fiber transmission systems. Our approach takes into account the …

Raman amplification is a solution for broadband wavelength-division multiplexed (WDM)
systems that require fine and reconfigurable gain tuning. However, as the fiber nonlinearity …

We show that the accumulation rate of nonlinearity in highly-dispersive long-haul coherent
links can also be measured from the nonlinear threshold decrease rate, and provide …

Recent advances in optical communications not only increase the capacities of
communication system but also improve the system dynamicity and survivability. Various …

This paper expands our previous work on record-low attenuation of 0.1460 dB/km,
measured on a silica-core fiber with 148 μm^ 2 effective area. We describe the technology …

Four-dimensional (4-D) set-partitioning quadrature amplitude modulation (4-D SP-QAM) has
emerged as an interesting option for cost-and resource-efficient realization of bandwidth …

We show that the effect of nonlinear interference in WDM systems is equivalent to slowly
varying inter-symbol-interference (ISI), and hence its cancelation can be carried out by …

The Gaussian noise (GN) model, in which the fiber nonlinearity is modeled as an additive
GN process, has been recently shown in the literature to be accurate for uncompensated …

We evaluate the performance penalty due to discrete Raman amplifier (DRA) in a long haul
WDM transmission system. The investigation was primarily performed to study the impact of …

The nonlinear transmission performance of quasi-Nyquist wavelength-division multiplexing
(qN-WDM) and reduced guard interval orthogonal frequency-division multiplexing (RGI …