Spatio-temporal characterization of double plasma mirror for ultrahigh contrast and stable laser pulse
Spatio-temporal characterization of double plasma mirror for ultrahigh contrast and stable laser pulse
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DOI：
10.1007/s00340-011-4584-2
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发表时间：
2011-07-01
影响因子：
2.1
通讯作者：
Lee, J.
中科院分区：
文献类型：
--
作者：
Kim, I. J.;Choi, I. W.;Lee, J.
通过采用安装在 100 TW Ti:sapphire 激光系统末端的双等离子体镜，在主脉冲之前实现了超过 10(11) 6 ps 的超高对比度激光脉冲。人们发现双等离子体镜上的空间光束质量（例如聚焦性和稳定性）在 14-360 J/cm(2) 范围内极其敏感，同时保持超高对比度。在90 J/cm(2)的注量下，超高对比度激光的聚焦能力没有下降，并且当分析多个激光束轮廓的二维归一化标准偏差和相关函数时，稳定性非常接近没有双等离子体镜时获得的稳定性。这些结果是利用超高对比度激光脉冲进行相对论性激光-等离子体相互作用的必要条件，从而能够使用超薄固体靶材。
An ultrahigh contrast laser pulse of over 10(11) for 6 ps before the main pulse was achieved by employing a double plasma mirror installed at the end of a 100 TW Ti:sapphire laser system. Spatial beam qualities such as focusability and stability were found to be extremely sensitive in the range of 14-360 J/cm(2) on the double plasma mirror, while ultrahigh contrast was maintained. At the fluence of 90 J/cm(2) the focusability of the ultrahigh contrast laser was not degraded, and the stability was very close to that obtained without the double plasma mirror when the 2-dimensional normalized standard deviation and the correlation function for several laser beam profiles were analyzed. These results are requisites for carrying out relativistic laser-plasma interactions with ultrahigh contrast laser pulses, enabling the use of ultrathin solid targets.