Prepulse-free petawatt laser for a fast ignitor
Prepulse-free petawatt laser for a fast ignitor
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DOI：
10.1109/jqe.2003.823043
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发表时间：
2004-03
影响因子：
2.5
通讯作者：
Y. Kitagawa;H. Fujita;Ryosuke Kodama;Hidetsugu Yoshida;Satoshi Matsuo;T. Jitsuno;T. Kawasaki;Hisao Kitamura;T. Kanabe;Shuji Sakabe;K. Shigemori;N. Miyanaga;Yasukazu Izawa
中科院分区：
文献类型：
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作者：
Y. Kitagawa;H. Fujita;Ryosuke Kodama;Hidetsugu Yoshida;Satoshi Matsuo;T. Jitsuno;T. Kawasaki;Hisao Kitamura;T. Kanabe;Shuji Sakabe;K. Shigemori;N. Miyanaga;Yasukazu Izawa
我们开发了一种峰值功率为 0.9 PW 的无预脉冲短脉冲 Nd：玻璃激光系统，用于加热预内爆高密度等离子体。引入光学参量啁啾放大系统，将预脉冲降低至主脉冲的幅度（1.5/spl 倍/10/sup -8/）。压缩器是直径 94 厘米的双路光栅对系统，可将直径 50 厘米的激光束压缩至 470 fs。离轴抛物面镜将 420-J 能量聚焦到强度 2.5/spl times/10/sup 19/ W/spl middot/cm/sup -2/。啁啾脉冲前端的一部分被播种到 GEKKO XII 激光器的前置放大器中，用于使弹丸目标内爆，从而使拍瓦激光器能够在几十皮秒的停滞期间照射预内爆的弹丸。
We have developed a prepulse-free short-pulse Nd:glass laser system of 0.9-PW peak power to heat a pre-imploded high-density plasma. An optical parametric chirped amplification system is introduced to reduce the prepulses to an amplitude (1.5/spl times/10/sup -8/) of that of the main pulse. The compressor is a double-path grating pair system 94 cm in diameter compressing the 50-cm-diameter laser beam to 470 fs. An off-axis parabolic mirror has focused the 420-J energy to an intensity of 2.5/spl times/10/sup 19/ W/spl middot/cm/sup -2/. Part of the front end of the chirped pulse is seeded into the preamplifier of the GEKKO XII laser, used to implode a pellet target, to enable the petawatt laser to irradiate the pre-imploded pellet during stagnation of a few tens of picoseconds.