Ali Yousif Fattah

University of Technology, Iraq · Department of Communication Engineering

In this paper, the influence of physical layer impairments on fiber optic channels was evaluated using analytical modeling, and the findings were verified through simulation results. Light propagation inside standard single mode fiber (SSMF) is affected by both linear and nonlinear effects, which must be taken into account in order to develop an ap...

This paper presents an orthogonal frequency division multiplexing (OFDM) for a long-haul optical transmission system with high-rate transferability to alleviate dispersion effects. In addition, we suggest combining polarization division multiplexing (PDM) with coherent OFDM (CO-OFDM) to increase spectral efficiency (SE). Based on OptiSystem (2021)...

In this paper the characterization of the impact of physical layer impairments on quality of transmission of optical fiber transmission systems had been demonstrated analytically and verified numerically with simulation results. Linear and nonlinear impairments in optical links accurately characterized with analytical modeling techniques but on t...

Physical layer impairments play a major role in optical transmission links performance. The impact of these impairments can be evaluated either analytically or empirically. Analytical modelling uses a closed and accurate mathematical formulas. On the other hand, empirical modeling uses simulation results or real time data to model this impact. In t...

The optical signal is severely degraded when transmitted in the fiber due to both the linear and nonlinear distortions. It is well known that, the linear distortions in single mode fiber include chromatic dispersion (CD) and polarization-mode dispersion (PMD) while self-phase modulation (SPM), cross phase modulation (XPM) and four-wave mixing (FWM)...

High bit rates optical communication systems pose the challenge of their tolerance to linear and nonlinear fiber impairments.The techniques processing of linear and nonlinear impairments involve which balance between linear and nonlinear impairments. Optical Solitons are the special breed of wave packets which can propagate over long distance witho...

An empirical modelling technique is introduced to estimate impact of physical layer impairments in elastic optical networks, which can be used to evaluate transmission quality. The model has been verified experimentally with accuracy beyond (97.3%).

An empirical modelling technique is introduced to estimate impact of physical layer impairments in elastic optical networks, which can be used to evaluate transmission quality. The model has been verified experimentally with accuracy beyond (97.3%). OCIS codes: (060.1660) Coherent communications, (060.0060) Fiber optics and optical communications.

High-capacity and long-haul transmission technologies are indispensable to develop cost-effective optical transport networks. Optical communication is rapidly advancing toward 1-Tera bit per second (Tb/s) and beyond transport. As the available bandwidth of Standard Single-Mode Fiber (SSMF) is limited, high Spectral Efficiency (SE) becomes an import...

In this paper 40 Gb/s DP-QPSK system with coherent reception and DSP unit for optical fiber impairments compensation is proposed. The DSP unit processes the detected coherent DP-QPSK signal. The Chromatic Dispersion (CD) is compensated using a simple transversal digital filter and Polarization Mode Dispersion (PMD) is compensated using adaptive but...

High bit rates optical communication systems pose the challenge of their tolerance to linear and nonlinear fiber impairments recently,the use of electronic processing for the mitigation of signal distortion in optical communication has attracted increasing interest due to its low cost and size relative to alternative optical techniques and the pote...

200 GHz-spaced 16-channel 40Gbit/s WDM signal transmission is proposed in C-band using 33% return-to-zero differential-phase-shift-keying (RZ-DPSK) format over a 5 spans of dispersion shifted-Anomalous fiber link. A parametric run on each span fiber length is performed (from 25 km up to 100 km). The performance of 16 40 Gb/s 33% RZ-DPSK WDM channel...

An extremely large 3-dB gain-bandwidth of 83 nm (185.8-195.3 THz) is achieved using Raman amplifier. The Raman amplifier consists of 70-km dispersion shifted fiber (transmission fiber) and a practical 1550-nm CW laser diode pump. 96 times10 Gb/s wavelength division-multiplexing (WDM) transmission is successfully demonstrated using 83-nm gain-band a...