Optimization noise figure of fiber Raman amplifier based on bat algorithm in optical communication network

Hamid Ali Abed Al-Asadi,Majida Ali Al-Asadi,Nada Ali Noori

doi:10.14419/ijet.v7i2.11062

Abstract

Designing Raman amplifier with high On-Off again and low noise figure is required in in optical communication networks, due to wide and tunable amplification and low nonlinearity. This paper proposes a new configuration design to the single mode fiber Raman amplifier using a multi-objective bat algorithm. The main aim of the proposed method is to preserve the values of noise figure and ripple of the amplifier as low as possible while keeping the values of laser wavelength and the amplifier powers are high. The simulation results show that increasing the number of iterations is required, which would result in a flat gain spectrum with a considerable enhancement in the noise figure and minimal gain ripple that reaches to less than 0.18 DB.

Highlights

The nonlinear effects in optical fiber is a major issue in a Dense Wavelength Division Multiplexing (DWDM) system of optical telecommunication networks related to vibrational excitation modes of silica
This paper proposes a new configuration design to the single mode fiber Raman amplifier using a multi-objective bat algorithm
In order to evaluate the performance of our design, Bat algorithm is used with three cases of iterations, which are 100th, 500th, and 900th

Summary

Introduction

The nonlinear effects in optical fiber is a major issue in a Dense Wavelength Division Multiplexing (DWDM) system of optical telecommunication networks related to vibrational excitation modes of silica. Raman and Brillouin are the three stimulated scattering processes in optical networks. Among the first nonlinear effects studied in optical fibers is the stimulated Raman scattering (SRS) was studied in [1]. The spontaneous Brillouin and Raman scattering are produce a spectral shift of about 10 and 13000 GHz in silica optical fiber with time relaxation of 10-9 and 10-12 Sec, respectively [2, 3]. There has been many studies in optical communication network order to obtain devices to amplify the light using SRS in silicon [4, 5] and signal processing systems [6,7,8,9]. To get high signal to noise ratio, high Noise figure and minimal ripple of Raman gain and flatness in the optical communication network design by optimization the proper pump configuration and other parameters of the amplifier

Theoretical modeling of fiber Raman amplifiers

Experiment setup to the simulation structure

Implementation of bat algorithm optimization

Results and discussions

Conclusion