A system and method for generating ultraviolet laser radiation by pumping a ruby based active laser medium (21", 93) with an output from a laser cavity (34', 71) which output is the frequency doubled (30') fundamental of a diode pumped solid state laser material (21', 75). The laser emission of the ruby based active laser material is in turn frequency double by a non linear crystal (30") placed inside the laser cavity. For efficient frequency conversion the laser cavities preferably use resonant reflectors. Enhancement of intracavity second-harmonic generation by using a coupled cavity with optimized reflectivity of the SH output coupler (48', 48") which acts as a beam splitter.
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