Geometrically-shaped multi-dimensional modulation formats in coherent optical transmission systems
Sha** 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 …
harvest spectral efficiency gains in both the additive white Gaussian noise (AWGN) channel …
Chaotic phase noise-like encryption based on geometric sha** for coherent data center interconnections
W Zeng, C Zhang, X Liang, Y Luo, X Wang, K Qiu - Optics Express, 2024 - opg.optica.org
The network traffic of data centers (DCs) has increased unprecedentedly with the rapid
development of digital economy. However, the data transmission faces security threats in the …
development of digital economy. However, the data transmission faces security threats in the …
Analytical model of nonlinear fiber propagation for general dual-polarization four-dimensional modulation formats
Coherent dual-polarization (DP) optical transmission systems encode information on the
four available degrees of freedom of an optical field: the two polarization states, each with …
four available degrees of freedom of an optical field: the two polarization states, each with …
On the Performance Limits of High-Speed Transmission Using a Single Wideband Coherent Receiver
The performance of a wideband coherent receiver was investigated. The relative impact of
digital pre-distortion, geometric constellation sha** and pilot sequence detection, as well …
digital pre-distortion, geometric constellation sha** and pilot sequence detection, as well …
Geometric sha** for distortion-limited intensity modulation/direct detection data center links
Intra-data center links are subject to transmission impairments that pose challenges for
efficient scaling of per-wavelength data rates beyond 100 Gb/s. Limited electrical and optical …
efficient scaling of per-wavelength data rates beyond 100 Gb/s. Limited electrical and optical …
Physical realizations of multidimensional Voronoi constellations in optical communication systems
Multidimensional geometric sha** has been shown to outperform uniform quadrature
amplitude modulation (QAM) in optical communication systems but the complexity of symbol …
amplitude modulation (QAM) in optical communication systems but the complexity of symbol …
Design of Low-Complexity Coded Modulation Employing High-Order QAM With Systematic Geometric Constellation Sha**
E Kurihara, H Ochiai - IEEE Open Journal of the …, 2024 - ieeexplore.ieee.org
In this work, we investigate the performance of geometric constellation sha** for highorder
coded quadrature amplitude modulation (QAM) over an additive white Gaussian noise …
coded quadrature amplitude modulation (QAM) over an additive white Gaussian noise …
Roadmap on optical communications
The Covid-19 pandemic showed forcefully the fundamental importance broadband data
communication and the internet has in our society. Optical communications forms the …
communication and the internet has in our society. Optical communications forms the …
Ultra-high-cardinality geometric sha** in the finite SNR regime
Four-dimensional (4D) constellations with up to 131 072 points (17 bit/4D-sym) are
designed for the first time using geometric sha**. The constellations are optimized in …
designed for the first time using geometric sha**. The constellations are optimized in …
End-to-end optimization of optical communication systems based on directly modulated lasers
The use of directly modulated lasers (DMLs) is attractive in low-power, cost-constrained
short-reach optical links. However, their limited modulation bandwidth can induce waveform …
short-reach optical links. However, their limited modulation bandwidth can induce waveform …