Improve Quality Factor by Using DWDM Technology for Long Distances and Different Power Levels

Mariam lazem; Ali Mahdi  Hammadi; Ali Al-Askery

doi:10.51173/jt.v4i4.588

Authors

Mariam lazem Electrical Engineering Technical College, Middle Technical University, Baghdad, Iraq.
Ali Mahdi Hammadi Electrical Engineering Technical College, Middle Technical University, Baghdad, Iraq.
Ali Al-Askery Electrical Engineering Technical College, Middle Technical University, Baghdad, Iraq.

DOI:

https://doi.org/10.51173/jt.v4i4.588

Keywords:

DWDM, Modified Duo Binary Scheme, MRZ, SMF, DCF, Q-Value, BER

Abstract

In optical fiber communications, data travels from the transmitter to the receiver, where it is collected and converted from optical pulses into electrical signals. The need for bandwidth has grown significantly in recent years. Dense Wavelength Division Multiplexing (DWDM), an advanced multiplexing technology that allows multiple signals to be delivered simultaneously at different wavelengths in the same channel, has been developed to meet the demand for higher capacity and faster data rates. There is a decrease in signal quality as a result of the pulse expansion caused by the scattering. During long-distance transportation, scattering should be minimized. In this research, The DWDM link model uses OptiSystem 18. The DWDM design uses 48 channels, 200 GHz channel spacing, and a bit rate of 40 Gbps for each channel The link length used is 240 and 300 km, using SMF (Single Fiber Mode) and DCF (Dispersion Compensation Amplifier). The research was performed with differences in laser power of 0, 3, and 5 dBm. From the results of the analysis carried out, changes in power changes affect the performance of the system using the MRZ (Mach Zander rate) produced by a CW-10 dB laser. The laser power values correspond to the standard Q-factor and BER (Bit Error Rate) values. The highest Q-factor is 23.266 and BER is 4.66232e-0120, while the lowest Q-factor is 14.9477 and BER is 7.89923e-051. Research has shown The more laser power is used, the better the system's performance.

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