Temporal pulse-shaping for laser-fusion experiments using a cavity-dumped O-switched oscillator

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Abstract
For the purpose of generating temporally shaped laser pulses in the nanosecond domain a cavity-dumped Q-switched oscillator has been constructed. It has proven to be versatile, efficient, reliable, and stable. Its performance has been demonstrated through the generation of flat-topped step pulses with rise-times of 0.2 ns and controllable duration of between 1 and 4 ns, and through the generation of double-step (Nuckolls type) pulses. Peak powers of 0.3 MW in TEM00, 1 mrad divergence pulses are routinely obtained. With one additional isolated stage 'slaved' to the cavity-dump Pockels cell, a prepulse energy contrast of 7*105 is achieved. Output energy variation is +or-7%.

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