Gain Of Single-Mode Birefringence Fiber Acted By Raman Scattering And Parametric Amplification

The parametric amplification and stimulated Raman scatteringtal etal Non-linear effect can been produced when the intensity of a light pulse in birefringence fiber has reached the threshold. Based on this, The coherently coupled nonlinear Schrodinger (NLS) equation has been utilized when propagation of a light pulse in birefringence fiber. The gain have been obtained that combining Parametric Amplification and Raman scattering.First of all, after take into account Raman effect. The gain spectra as a function of input pump power and the group velocity mismatch etal interrelated parameter have been numerical simulated when the pump wave polarization orientation at the birefringent axes 45°region in different dispersion regime. The results show that gain spectrum obviously vary in different dispersion regime. The input pump wave can be changed into pulse array und-er certain conditions. So that we can extract super-short pulses from it.Secondly, under the condition of weak signal, according to the equation of interaction of stokes wave,anti-stokes wave and the pump wave, the gain of stokes wave and anti-stokes wave with the related parameters have been discussed which are perpendicular to the polarization direction of pump wave. The result shows that gain spectra are absolutely symmetrical perpendicular to the pump. At the same time, the aim of outputing the frequency conversion of the Stokes and anti-stokes can been achieved in appropriate transmission place by changing mismatchΔk3...