The performance of advanced modulation schemes for spectrally efficient data transmission
is reviewed, targeting short-range intensity-modulated optical channels with direct detection …

Publisher Summary It is noted that early lightwave systems employed non–return–to–zero
(NRZ) modulation. The newer long-haul systems use return–to–zero (RZ) and chirped RZ …

By exploiting the electromagnetic wave's four-dimensional signal space, we find that for the
additive white Gaussian noise channel, the modulation format with best sensitivity to be an 8 …

This article presents an efficient error-control code (ECC) and modulation for an optical
communications channel. The coded modulation is designed to support NASA's Mars Laser …

In high-bit-rate optical transmission systems, distortions due to dynamic chromatic
dispersion, polarization mode dispersion, and power changes are larger than the distortion …

Coherent optical transmission systems have a four-dimensional (4–D) signal space (two
quadratures in two polarizations). These four dimensions can be used to create modulation …

A novel family of optical line codes to counteract the effects of a dispersive fiber is presented.
The performance of the first code in the family, referred to as order-1 code, is analytically …

Probabilistic shaping for intensity modulation and direct detection (IM/DD) links is discussed
and a peak power constraint determined by the limited modulation extinction ratio (ER) of …

Short range optical data links are experiencing bandwidth limitations making it very
challenging to cope with the growing data transmission capacity demands. Parallel optics …

Since the advent of optical communications, a greattechnological effort has been devoted to
the exploitation of the huge bandwidth of optical fibers. Sta-ing from a few Mb/s single …