Spectral characteristics of dye laser with coaxial cell pumped on inside

The possible using of the coaxial cell for solid-state lasers and dye laser fabrication were previously investigated. The emission characteristics of such lasers were studied in detail by previous authors. The formation and evolution regularities of the directional diagram conditioned by the pumping mode of the coaxial cell were particularly investigated. It is found that the cavity of the dye laser with the internally excited coaxial cell (DLIECC) becomes similar to an unsteady one and therefore the directional diagram of its radiation is very narrow. In comparison with the dye lasers with external excitation of the cell (DLEEC) the radiation spatial brightness of the DLIECC is increased by more than 20 times.