Abstract

We report on a Nd:YVO<sub>4</sub> regenerative amplifier (RA), end pumped by 888 nm-diode lasers. The output power was about 46W at repetition rates from 150 to 833kHz with an M<sup>2</sup>-factor of 1.2. The amplifier was seeded by a gain switched diode laser, generating pulses with a duration of 65 ps and a pulse energy of &asymp; 5 pJ. The high gain of the RA of more than 70 dB provides amplified pulse energies as high as 180&mu;J. Bifurcations of the pulse energy could be avoided. Pulse amplitude fluctuations of only 1.2% for 10,000 consecutive pulses were measured. The long term output power stability of the laboratory setup was 0.3%.

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