Complete characterization of a plasma mirror for the production of high-contrast ultraintense laser pulses -: art. no. 026402
Complete characterization of a plasma mirror for the production of high-contrast ultraintense laser pulses -: art. no. 026402
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DOI：
10.1103/physreve.69.026402
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发表时间：
2004-02-01
影响因子：
2.4
通讯作者：
Wittmann, T
中科院分区：
文献类型：
--
作者：
Doumy, G;Quéré, F;Wittmann, T
提高超短超强激光脉冲的时间对比度是高场实验的主要技术问题。这可以使用所谓的“等离子体镜”来实现。“我们对等离子体镜进行了详细的实验和理论研究，使我们能够定量评估该系统的性能。我们的实验结果包括等离子体镜反射率的时间分辨测量，以及它引起的反射光束的相位畸变。用一个等离子体反射镜，以镀膜平板为靶，可使对比度提高两个数量级以上。我们表明，该系统是非常强大的脉冲能量密度和光束空间轮廓的缺陷，这是必不可少的应用程序的变化。
Improving the temporal contrast of ultrashort and ultraintense laser pulses is a major technical issue for high-field experiments. This can be achieved using a so-called "plasma mirror." We present a detailed experimental and theoretical study of the plasma mirror that allows us to quantitatively assess the performances of this system. Our experimental results include time-resolved measurements of the plasma mirror reflectivity, and of the phase distortions it induces on the reflected beam. Using an antireflection coated plate as a target, an improvement of the contrast ratio by more than two orders of magnitude can be achieved with a single plasma mirror. We demonstrate that this system is very robust against changes in the pulse fluence and imperfections of the beam spatial profile, which is essential for applications.