A Compact All-Solid-State 630-ps 9.43-kHz High Power Nd:YAG/Nd:YVO₄ Hybrid Laser System

We present a simple and compact design for an all-solid-state laser amplifier system which can output 9.43-kHz 630-ps, 3.5-W pulse trains under 20W absorbed pumping power. The excellent matching between the repetition of its seed source and the fluorescence lifetime of the amplifying medium makes it quiet efficient for the four-pass amplifier to be pumped in cw mode without need of any synchronization device between the oscillator and the amplifier. The entire setup just covers an area of 55×25cm². The output average power fluctuation is less than ±pm1.5% within 10min and 3% within 6h.