Advantages to a diverging Raman amplifier

Advantages to a diverging Raman amplifier
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发散拉曼放大器的优点

DOI:
10.1038/s42005-018-0021-8
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发表时间:
2018
影响因子:
5.5
通讯作者:
Sadler J
Sadler J
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Sadler J

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等离子体拉曼不稳定性可以有效地将纳秒长的高功率激光脉冲压缩到亚皮秒的持续时间。尽管许多作者设想了一种会聚的光束几何结构用于拉曼放大,但在这里我们提出了完全相反的几何形状;放大应该从种子的强烈焦点开始。我们将耦合激光包络方程推广到包括这种非准直情况。这种新的几何结构完全消除了输出脉冲通常的拖尾二次峰,这通常会使效率降低一半。它还可将有效运行所需的初始种子脉冲能量降低数量级。在准直情况下,尽管时间脉冲包络不同,但演化是自相似的。二维粒子胞内模拟表明,仅用0.3MJ的能量就可以有效地放大发散的种子。脉冲没有次峰,在放大和发散时强度几乎恒定。
The plasma Raman instability can efficiently compress a nanosecond long high-power laser pulse to sub-picosecond duration. Although, many authors envisaged a converging beam geometry for Raman amplification, here we propose the exact opposite geometry; the amplification should start at the intense focus of the seed. We generalise the coupled laser envelope equations to include this non-collimated case. The new geometry completely eradicates the usual trailing secondary peaks of the output pulse, which typically lower the efficiency by half. It also reduces, by orders of magnitude, the initial seed pulse energy required for efficient operation. As in the collimated case, the evolution is self similar, although the temporal pulse envelope is different. A two-dimensional particle-in-cell simulation demonstrates efficient amplification of a diverging seed with only 0.3 mJ energy. The pulse has no secondary peaks and almost constant intensity as it amplifies and diverges.
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
P. Norreys
通讯作者: P. Norreys
DOI: 10.1088/1367-2630/18/5/053023
发表时间: 2016-05-12
影响因子: 3.3
作者:
Ceurvorst, L.;Ratan, N.;Norreys, P. A.
通讯作者: Norreys, P. A.
拉曼等离子体放大器的鲁棒性及其产生阿秒脉冲的潜力
DOI: --
发表时间: 2017
期刊:
影响因子: --
作者:
J. Sadler;M. Sliwa;Thomas F. Miller;M. Kasim;N. Ratan;L. Ceurvorst;A. Savin;R. Aboushelbaya;P. Norreys;D. Haberberger;A. Davies;S. Bucht;D. Froula;J. Vieira;R. Fonseca;Luís O. Silva;R. Bingham;K. Glize;R. Trines
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DOI: 10.1103/revmodphys.84.1177
发表时间: 2012-08-16
影响因子: 44.1
作者:
Di Piazza, A.;Mueller, C.;Keitel, C. H.
通讯作者: Keitel, C. H.
DOI: 10.1103/physrevlett.108.165006
发表时间: 2012-04-19
影响因子: 8.6
作者:
Ridgers, C. P.;Brady, C. S.;Bell, A. R.
通讯作者: Bell, A. R.