Intracavity pumped Yb: SFAP crystal emitting at 985 nm and second harmonic generation

Abstract

We present what is, to the best of our knowledge, the first experiment of intracavity pumping at 914 nm of an Yb:SFAP crystal emitting at 985 nm on the three-level laser transition. This configuration enabled us to indirectly diode-pump this ytterbium doped crystal, and to obtain 1.4 W output power at 985 nm for 20 W of incident pump power at 808 nm. Intracavity second harmonic generation has also been demonstrated in a KNbO3 crystal with a total of 120 mW linearly polarized output power at 492.5 nm on two output beams.