We demonstrate a highly efficient regenerative amplifier containing a single thin-disk gain medium delivering 220mJ of pulse energy at 1 kHz repetition rate with a pulse duration of 1.9 ps. The laser system consists of a seed laser, stretcher, regenerative amplifier resonator containing a single thin-disk and a compressor. The seed pulses are delivered by a commercial fiber oscillator emitting ~2 nJ pulses with a spectral bandwidth of 40 nm centered at 1030 nm.

© 2015 IEEE

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