Raman scattering of quasi-single-photon pulses in pumped fiber

Processes of Raman scattering of quasi-single-photon pulses in a single-mode optical fiber with pumping are theoretically considered. The peculiarity of the scattering is that the pumping creates non-equilibrium molecular vibrations, which significantly increases the probability of Raman scattering in the optical fiber. Non-equilibrium vibrations are expected to be when the stimulated Raman scattering takes place for the pump pulse. As a result, the length of the optical fiber has been estimated where the probability of the Raman scattering is increased.