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A diode-pumped laser system in joule-class energy has been developed at 100 Hz in nano-second to pico-second. A feasibility study has shown high slope efficiency of 44% and optical efficiency of 30% at 150 mJ pulse energy.
An 1-kJ laser system ldquoGENBUrdquo has been conceptually designed by using a large-aperture active-mirror amplifier with a cryogenic Yb:YAG ceramic, as a milestone for a new IFE reactor driver. A 1-J system ldquoGENBU-Kidrdquo is under construction for power-scaling up to 1 kJ.
Wavefront correction until Zernike polynomial of degree three by a phase conjugate plate has been demonstrated in a high-energy Nd:YLF amplifier system. 108 amplification of 380 mj has been achieved with a near-diffraction-limited beam quality.
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