Study On The 400 Mm 4 X 2 Combined Slab Amplifier System

This paper provides the experiment results of a 400 mm 4 x 2 combined slab amplifier system for high-power laser devices based on a new pumping configuration, which involves 37 nm-diameter pulse xenon lamps, a multilamp arrangement, an operating voltage of 31 kV and a uniform pumping arrangement comprising 12 and 14 xenon lamps in the middle and side flashlamp cassettes, respectively. The experimental results show that the small signal gain coefficient was 5.60% cm(-1). The pump-induced wavefront distortion accumulated by six slabs of Nd:glasses is 1.37 lambda peak-valley (PV) and the pointing offset value of pump beam is about 0.32 mu rad/slab/pass. After discharging, the system was purged with clean gas at 0.4 m s(-1). The cleanliness in the cavity returned to level 100 within 20 s, and the heat recovery time of the system was about 2 h.