The recently developed digital coherent receiver enables us to employ a variety of spectrally
efficient modulation formats such as-ary phase-shift keying and quadrature-amplitude …

Free space optical (FSO) communication system has obtained significant importance in
communication field due to its unique features: unlimited spectrum, larger bandwidth and …

As 100-Gb/s coherent systems based on polarization-division multiplexed quadrature phase
shift keying (PDM-QPSK), with aggregate wavelength-division multiplexed (WDM) capacities …

In this paper, we discuss building blocks that enable the exploitation of optical capacities
beyond 100 Gb/s. Optical networks will benefit from more flexibility and agility in their …

We report a technique for encoding both amplitude and phase variations onto a laser beam
using a single digital micro-mirror device (DMD). Using this technique, we generate …

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

The implementation difficulties of combining distribution matching (DM) and dematching
(invDM) for probabilistic shaping (PS) with soft-decision forward error correction (FEC) …

Optical networks have economically enabled an unabated exponential traffic growth over
the past decades, with commercial wavelength-division multiplexed (WDM) systems carrying …

In this paper, we examine the performance of several modulation formats in more than four
dimensions for coherent optical communications systems. We compare two high …

Shaping modulation formats in multi-dimensional (MD) space is an effective approach to
harvest spectral efficiency gains in both the additive white Gaussian noise (AWGN) channel …