Abstract
We have examined the phenomena of line-narrowing and bichromatic emission in random amplifying media by means of Monte Carlo simulations. We explain the various reported experimental features through a model that includes only the stimulated emission and self-absorption of photons performing a three dimensional random walk inside the amplifying medium. We present the results for all three regimes of scattering, L<l ∗ , L∼l ∗ and L>l ∗ .
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