Publications

We study the nonlinear effects of the electron conductivity in semiconductors when a strong high frequency (HF) electric field is applied together with a direct (DC) electric field.

Calculations show that phase nonlinearity in 1micron gate length power GaAs MESFET's can be accounted for by the variation of gate-channel capacitance with gate bias voltage.

We measure the impact of nonlinearities when upgrading a 10 Gb/s system with 40 Gb/s and 100 Gb/s coherent QPSK channels.

RZ-DQPSK and PSBT are seen as promising modulation formats for upgrading 10Gb/s networks to 40Gb/s.

We present recent developments on intermodal nonlinear interactions present in fibers supporting multiple spatial modes that are linearly coupled or uncoupled.

Nonlinear interactions that occur in an optical amplifier, between the carrier density and multiple optical signals, are described using a small- signal analysis.

We explore the potential benefits of digital nonlinearity compensation (NLC) techniques in fully loaded coherent wavelength-division multiplexed (WDM) transmission systems.

We show that neighboring channels with variable pre-dispersion distortions induce phase-noise like nonlinear interference to a non pre-dispersed reference channel.

As a non-linear precoding alternative to Tomlinson-Harashima precoding (THP), in this paper, so-called lattice reduction aided precoding (LRP) is considered as a crosstalk precompensation technique

: We evaluate the nonlinearity impact of neighbouring DPSK DWDM channels on one 100 Gb/s PDM-OFDM channel.