This paper reviews recent advances in the generation, detection and transmission of
orthogonal-frequency-division-multiplexing (OFDM) based superchannels, enabled by …

Nowadays, public demands high capacity global internet traffic in terms of cloud computing,
video gaming, fiber to the home and mobile networks, etc. To fulfill such huge traffic …

A novel low-complexity coherent receiver solution is presented to improve spectral efficiency
in wavelength-division multiplexing (WDM) systems. It is based on the receiver-side partial …

Polarization-diverse coherent demodulation allows to compensate large values of
accumulated linear distortion by digital signal processing. In particular, in uncompensated …

We demonstrate that channel spacing can be reduced to values smaller than the Nyquist
channel spacing over transoceanic distance. Modulation memory induced by constrained …

High-baud-rate coherent optical system is essential to support the ever-increasing demand
for high-speed applications. Owing to the recent progress in advanced modulation formats …

The key idea of this work is to treat the symbol-pattern-dependent inter-symbol-interference
(ISI) that is avoided in conventional single-symbol modulation systems as useful symbol …

We present the first experimental results for polarization-switched QPSK (PS-QPSK) and
make a comparison with polarization-multiplexed QPSK. Our measurements confirm the …

We have realized the first field transmission of 8 \,*\, 216.8-Gb/s Nyquist wavelength-division-
multiplexing (N-WDM) signals over 1750-km G. 652 fiber consisting of 950-km real and 800 …

Successful joint experiments with Deutsche Telecom (DT) on long-haul transmission of 100
G and beyond are demonstrated over standard single-mode fiber (SSMF) and inline erbium …