论文标题
在100mm长的流体动力学电场离子离子电源通道中的高强度激光脉冲指导
Guiding of high-intensity laser pulses in 100mm-long hydrodynamic optical-field-ionized plasma channels
论文作者
论文摘要
研究了多达100mm长的流体动力学光场（HOFI）等离子体通道。光学指南显示了激光脉冲的峰值输入强度为$ 6 \ times10^{17} $ W cm $^{ - 2} $通过100mm长的等离子通道，其轴上密度在轴上密度均衡，以均值为单位，以$ n_ {e0} = $ n_ {e0} = （1.0 \ pm0.3）\ times10^{17} $ cm $^{ - 3} $。还观察到在较低的轴向密度下观察到的指南，从磁湿动力学模拟中推断出的指导性约为$ 7 \ times10^{16} $ cm $^{ - 3} $。证明通道的功率衰减长度的测量与根据测得的横向电子密度曲线计算的速度非常吻合。据我们所知，在这项工作中研究的等离子通道是最长的，并且具有最低的轴密度，这是任何独立的波导，以指导强度高于$> 10^{17} $ w cm $^cm $^{ - 2} $的激光脉冲。
Hydrodynamic optically-field-ionized (HOFI) plasma channels up to 100mm long are investigated. Optical guiding is demonstrated of laser pulses with a peak input intensity of $6\times10^{17}$ W cm$^{-2}$ through 100mm long plasma channels with on-axis densities measured interferometrically to be as low as $n_{e0} = (1.0\pm0.3)\times10^{17}$cm$^{-3}$. Guiding is also observed at lower axial densities, which are inferred from magneto-hydrodynamic simulations to be approximately $7\times10^{16}$cm$^{-3}$. Measurements of the power attenuation lengths of the channels are shown to be in good agreement with those calculated from the measured transverse electron density profiles. To our knowledge, the plasma channels investigated in this work are the longest, and have the lowest on-axis density, of any free-standing waveguide demonstrated to guide laser pulses with intensities above $>10^{17}$ W cm$^{-2}$.
