The coherently coupled nonlinear Schrdinger (NLS) equation in which Parametric Amplification and Raman scattering together acting has been utilized in high birefringence Dispersion Shifted fiber. The gain spectrums have been studied under Raman scattering and parametric amplification together acting when the pump wave polarization is oriented at 45° between the axes by quoting Lorentzian model of Raman gain spectra in high birefringence Dispersion Shifted fiber. The result shows that the gain spectrums only has relationship with magnitude of third-order dispersion and fourth-order dispersion. The Stokes Gain has displayed single pulse when biggish input power in the normal dispersion regime. So that the T frequency single pulses can been extracted when high birefringence Dispersion Shifted fiber has been used.