Characterization, measurement and specification of device imperfections in optical coherent transceivers

Z Tao, Y Fan, X Su, K Zhang, C Yang, T Ye… - Journal of Lightwave …, 2022‏ - opg.optica.org
Transceiver imperfections become the primary source of impairment as baud rate and
modulation order grow in advanced optical coherent communications. Thus, transceiver …

800-Gb/s/carrier WDM coherent transmission over 2000 km based on truncated PS-64QAM utilizing MIMO Volterra equalizer

M Kong, J Shi, B Sang, J Ding, K Wang… - Journal of Lightwave …, 2022‏ - ieeexplore.ieee.org
We provided a feasible solution for 800-Gb/s per carrier long-distance wavelength division
multiplexing (WDM) coherent optical fibre transmission based on offline DSP. We …

Learnable digital signal processing: a new benchmark of linearity compensation for optical fiber communications

Z Niu, H Yang, L Li, M Shi, G Xu, W Hu… - Light: Science & …, 2024‏ - nature.com
The surge in interest regarding the next generation of optical fiber transmission has
stimulated the development of digital signal processing (DSP) schemes that are highly cost …

Transceiver imbalances compensation and monitoring by receiver DSP

J Liang, Y Fan, Z Tao, X Su… - Journal of Lightwave …, 2019‏ - ieeexplore.ieee.org
In-phase and quadrature (IQ) imbalances in optical transceiver, such as amplitude
imbalance, phase imbalance, and IQ skew, can cause serious system performance …

Analysis and experimental demonstration of orthant-symmetric four-dimensional 7 bit/4D-sym modulation for optical fiber communication

B Chen, A Alvarado, S van der Heide… - Journal of Lightwave …, 2021‏ - opg.optica.org
We propose a new four-dimensional orthant-symmetric 128-ary modulation format (4D-
OS128) with a spectral efficiency of 7 bit/4D-sym. The proposed format fills the gap between …

Algorithms for blind separation and estimation of transmitter and receiver IQ imbalances

Q Zhang, Y Yang, C Guo, X Zhou, Y Yao… - Journal of Lightwave …, 2019‏ - ieeexplore.ieee.org
We propose a blind transmitter (Tx) and receiver (Rx) in-phase/quadrature (IQ) amplitude
and phase imbalances estimation scheme based on a combination of analytical modeling …

Hardware-efficient and robust DSP scheme for coherent DSCM system in presence of transmitter IQ impairments

L Fan, Y Yang, S Gong, C Cheng… - Journal of Lightwave …, 2023‏ - ieeexplore.ieee.org
A hardware-efficient and robust DSP scheme for the coherent digital subcarrier multiplexing
(DSCM) system in presence of transmitter (Tx) in-phase/quadrature (IQ) impairments is …

Multi-dimensional, wide-range, and modulation-format-transparent transceiver imbalance monitoring

Q Zhang, Y Yang, C Gu, Y Yao… - Journal of Lightwave …, 2020‏ - ieeexplore.ieee.org
We propose and experimentally demonstrate a dual-polarization (DP) transceiver imbalance
monitoring scheme, which is applicable for the coherent system using square QAM signals …

Carrier recovery for satellite-to-ground coherent laser communication systems using double feedback loop and Viterbi–Viterbi feedforward cascade structure

N Liu, C Ju, D Wang, X Zhang, C Li - Optics Communications, 2023‏ - Elsevier
High dynamic and wide range frequency offset in satellite-to-ground coherent optical
communication system caused by Doppler frequency shift, transceiver laser frequency offset …

Mode-dependent loss and gain estimation in SDM transmission based on MMSE equalizers

RSB Ospina, M Van den Hout… - Journal of Lightwave …, 2021‏ - opg.optica.org
The capacity in space division multiplexing (SDM) systems with coupled channels is
fundamentally limited by mode-dependent loss (MDL) and mode-dependent gain (MDG) …