Detuned Raman amplification of short laser pulses in plasma
Detuned Raman amplification of short laser pulses in plasma
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DOI：
10.1103/physrevlett.84.1208
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发表时间：
2000-02-07
影响因子：
8.6
通讯作者：
Fisch, NJ
中科院分区：
文献类型：
--
作者：
Malkin, VM;Shvets, G;Fisch, NJ
最近提出的所谓的激光脉冲在等离子体中的“快速压缩”方案可以使激光强度提高10(5)[物理。莱特牧师。82、4448(1999)]。压缩机制是瞬时受激拉曼背向散射，即使在高超临界功率下，它也超过了泵浦脉冲最快的成丝不稳定性。这封信提出了一种新的非线性滤波效应，它抑制了泵浦在噪声等离子体层中的过早后向散射，同时以高效率保持了足够强的种子的所需放大。这种效果是基本感兴趣的，也使其对噪声具有健壮性，这是技术上最简单的快速压缩方案。
The recently proposed scheme of so-called "fast compression" of laser pulses in plasma can increase peal; laser intensities by 10(5) [Phys. Rev. Lett. 82, 4448 (1999)]. The compression mechanism is the transient stimulated Raman backscattering, which outruns the fastest filamentation instabilities of the pumped pulse even at highly overcritical powers. This Letter proposes a novel nonlinear filtering effect that suppresses premature backscattering of the pump in a noisy plasma layer, while the desired amplification of a sufficiently intense seed persists with a high efficiency. The effect is of basic interest and also makes it robust to noise the simplest technologically fast compression scheme.