Comparison Study of Distributed Raman Amplifier Gain Characteristics on CWDM Band by Employing SMF, NZDF, DCF, DSF Based on Numerical Simulation

摘要

On this preliminary work we employ Distributed Raman Amplifier with pumping schemes are forward- & backward pumping on SMF. The model of simulation and analysis used are multiple-pump interactions on CWDM band. We used four level configuration of pumps on wavelengths; 1435nm, 1445nm, 1455nm and 1465nm with the range of tuneable power levels are 300m Watt - 400m Watt each ones. The average results of Stokes gain measured at L=0Km and L=40Km are 17.875B and -3.5dB respectively while the Noise Figure is at the range of 3dB - 2.5dB. The maximum length of fiber are reach at L=～50Km. Two factors found that could decreasing the performances of Distributed Raman Amplifier are amplified spontaneous scattering (ASS) and Rayleigh backscattering effects. Finally the flattening gains for C band are reached successfully.