Design and Simulation of an Optical Gigabit Ethernet Network

Omar Ahmed Yousif,Salah A Jaro Alabady

doi:10.33899/rengj.2010.28461

Abstract

This paper deals with the design and simulation of an optical gigabit Ethernet using OPTSIM 3.6 packet software. The main aim of the proposed design is to build a MAN optical network using one-gigabit Ethernet technique, and what are the necessary requirements to build these networks. As a case study, all states center are connected as Star – Bus topology using layer2 and layer3 optical switches. In addition, in this paper one-gigabit optical transmitter and receiver are designed to work as a node in the network topology. Further more, the benefits of using L- Band wavelength for transmission take in consider the linear and non-linear effects on fiber optic is presented.

Highlights

Networks are being converted from copper to optical fiber
This paper provides, detailed general guidance to design optical network using gigabit Ethernet technique at longer wavelength, and give a case study to connect all universities in IRAQ
Stimulated Brillouin scattering (SBS) is a nonlinear process that can occur in optical fibers at input power levels much lower than those needed for stimulated Raman scattering (SRS)

Summary

1- Introduction

Networks are being converted from copper to optical fiber. As a result, network design procedures need to be adjusted to address the specific requirements of fiber optic cable as a communications transport media. Stimulated Brillouin scattering (SBS) is a nonlinear process that can occur in optical fibers at input power levels much lower than those needed for stimulated Raman scattering (SRS). It manifests through the generation of a backward- propagating Stokes wave that carries most of the input energy, once the Brillouin threshold is reached. The SBS power threshold versus fiber length can be plotted using equation (8) as shown in Figures (4)a The SBS threshold power for the farthest distance between two cites (fiber length 250 km) Pth(SBS)= 1.3dBm (1.3mW) This means we can assume the scattered power due to SBS will occur in the proposed system above Pth(SBS)=1.3dBm , we should limit launch power to less than 1.3dBm. Phase modulation of an optical signal by itself is known as self-phase modulation (SPM).

D Power transmitter

- Conclusion