Influence of excitation conditions on laser action in organic dye solutions

The relationship between the laser action in organic dye solutions with an output energy of ~ 10² J and the pump source characteristics is discussed. It is shown that the specified conditions are satisfied best by a cavity electric-discharge pump source operating under a near-critical damped oscillatory regime. The most effective method for attaining this regime is a reduction in the active resistance of an electric-discharge plasma by lowering the gas pressure in the discharge cavity, which also ensures an increase in the mechanical strength of the source. A comparison is made of the calculated and experimental energy parameters of a laser utilizing a solution of rhodamine 6G in ethyl alcohol with an output energy of 130 J.