核融合炉用スケールダウンレーザー(10J・10Hz級)の開発研究 [in Japanese] Development of Scale-Down Laser (Class of 10J & 10Hz) for Inertial Fusion Reactor [in Japanese]
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A diode-pumped solid-state laser (DPSSL) for inertial fusion energy driver has been demonstrated, which produces the 1053-nm output energy of 10 J at 10 Hz. The glass slab laser amplifier is pumped by quasi-continuous wave 290-kW AlGaAs laser-diode arrays at 803 nm. The optical system enable to compensate for thermal effects by use of zig-zag optical propagation, image-relayed telescope, and 45 degree Faraday rotator. The output energy of 8.4 J at 10 Hz with the optical to optical conversion efficiency of 15.8 % has been successfully obtained, collecting within a 4.4 times diffraction limited area. The results indicate that the DPSSL technology is promising for realizing rep. rate, high average power as well as high energy scaling.
rle 34(9), 652-656, 2006-09-15
The Laser Society of Japan