Figure 2
From: Decoupling gain and feedback in coherent random lasers: experiments and simulations
Below and above threshold emission regimes.
Spontaneous emission and ASE detected from the dye solution free of scatterers, obtained with different pump lengths between 0.9 mm and 1.5 mm (a). Spectra collected from left (red lines) and right (black lines) diffusive mirrors in different laser structures with d = 1.0 mm (b) and d = 1.6 mm (c) and with L = 0.9·d.
