High efficiency 2 J 20 Hz diode pumped Nd:YAG active mirror master oscillator po

A high-efficiency joule-class diode-pumped Nd:YAG active-mirror amplifier was demonstrated. By using four elastically held Nd:YAG slabs as the active medium, we achieved a stable operation with an output pulse energy of 2.3 J at a repetition rate of 10 Hz (2.1 J at 20 Hz) in a 15 ns pulse in two-pas