Fig. 6: Photon scattering processes in random lasers with their representative spectra.
From: Low-coherence semiconductor light sources: devices and applications
Schematic diagrams of (a) coherent random lasing with multiple scattering in closed-loop paths formed by disordered particles confining the light in the gain medium, and (b) incoherent random lasing with opened-loop photon scattering paths. Typical emission spectrum of (c) coherent RLs and (d) incoherent RLs.
