Radiation divergence of microsecond lasers based on a solution of rhodamine 6G and a solid-state laser based on a perylene-activated nanocomposite

Radiation divergences of a microsecond laser based on an ethanol solution of rhodamine 6G and a solid-state laser based on a perylene-activated nanoporous glass--polymer composite (NPG--P) are comparatively investigated as functions of the pump energy density. It is found that the main reason for a greater radiation divergence of the laser based on a NPG--P nanocomposite is the light scattering of pump radiation and laser radiation by a heterogeneous medium of the composite, as well as thermal self-action.