Superradiance and Raman scattering in three-level molecular system

A model is presented for the dynamics of superradiance, coherent and stimulated Raman scattering from an optically pumped three-level system. The evolution of the pumping and two counterpropagating waves in the adjacent transition are taken into account. The results of computer simulation show that by specifying the pumping pulse area, and active medium length and pressure we can control the parameters of the pulses in the adjacent transition. The possibilities of observing coherent Raman scattering dynamics, which are significantly different from that for stimulated Raman scattering, are shown. The results of simulation show that for the ultrashort pumping pulse the superradiative emission in the backward direction is formed within the coherence length near the entrance plane of the active medium.