Intracavity frequency doubling acousto-optic Q-switched high repetition rate high-energy Nd:YLF laser.

ABSTRACT

The ongoing advancement of Tisapphire femtosecond laser technology has drawn increasing attention to high repetition rate, high-energy green lasers as ideal pump sources for Tisapphire regenerative amplifiers. This study employed a neodymium-doped yttrium lithium fluoride (NdYLF) as the gain medium, supplemented with side-pumped laser diodes, acousto-optic Q-switching, and intracavity frequency doubling technologies. The results demonstrated a repetition rate ranging from 1-10 kHz, a pulse width of less than 100 ns, and a single pulse energy exceeding 50 mJ at 527 nm green light output. Furthermore, an operating stability (RMS) of ≤0.15% was maintained for 14 h at a repetition rate of 1 kHz and an output power of 40 W.