Abstract: Optical gain media filled with strong scatterers present a laser-like emission when optically pumped.Different regimes can be evidenced where amplified spontaneous emission together with multiple scattering play the main role. A mapping technique where both the concentrations of dye molecules and scatterers are independently varied allows to differentiate between those regimes. A simple model based on photon diffusion is presented and threshold for lasing emission is derived, and is compared with the experiment. Qualitative agreement is found, showing that the threshold critically depends on the samples macroscopic size.
Publication Year: 1997
Publication Date: 1997-09-22
Language: en
Type: article
Indexed In: ['crossref']
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