Abstract
The random lasing emission of dyed vesicular polymeric films under the diffusive regime of light propagation is investigated at helium temperature. It represents itself the coupling effect of the stimulated emission and the stimulated Raman scattering (SRS). Due to this effect, all the Raman lines are revealed in the random lasing spectrum. A distinguishing feature of the effect is that the stimulated emission (SE) promotes revealing the Raman lines. The intensity of Raman lines quadratically depends on the pumping intensity. Furthermore, the SRS under this condition has a more structured spectrum than the spontaneous Raman one. It makes it possible to detect even weak and closely located spectral lines.
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