Frequency doubling of visible Pr-laser radiation in continuous wave and pulsed mode

This paper reports on new results regarding the generation of 320 nm wavelength both in continuous wave and pulsed mode by actively Q-switching of the cw Pr-laser. For the cw experiments, a frequency doubled optically pumped semiconductor laser is used providing 1.6 W of linear polarized laser radiation at 480 nm with a nearly diffraction limited beam.