Abstract: A scanning beam laser pumped laser is disclosed which is capable of producing pulses of 50 or more microsecond duration with a repetition rate of 100 Hz or more and an energy content per pulse of 3 joules or more. Optics focus the output beam of the pumping laser onto the front surface of the pumped laser which may comprise a flowing dye cell. A rotating mirror synchronized with the pulse repetition rate of the pumping laser moves the spot across the dye in the pumped laser in a direction preferably orthogonal to the flow of dye therein. A spherical mirror behind the rear surface of the dye cell reflects radiant energy back toward the rotating mirror. Reflective radiance is turned therefrom to, in part, pass through the aperture of a beam-combining mirror. The small fraction of radiant energy passing through either a partially reflecting surface or a small aperature on the beam combining mirror enters a resonant cavity whose dimensions define the wavelength of the pumped laser.