Abstract
Very efficient and stable laser operation of Ce 3+-doped LiLuF 4 (Ce:LLF) single crystals longitudinally pumped with a Ce:LiSAF pulsed laser is demonstrated for the first time. At the peak operating wavelength of 308 nm, laser thresholds as low as 250 mJ cm −2 and laser slope efficiencies and output energies as high as 55% and 2 mJ, respectively, have been obtained at a pulse repetition rate of 20 Hz.
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