论文标题
使用反向传播孤子的泵探针研究气体充满光子晶体纤维的血浆动力学研究
Pump-probe study of plasma dynamics in gas-filled photonic crystal fiber using counter-propagating solitons
论文作者
论文摘要
我们提出了一种用于监视超快极化性变化的泵探针技术。特别是，我们使用它来测量在充满气体空心的光子光子晶体纤维中自动压缩的高阶泵索尼顿的时间焦点下产生的等离子体密度。这是通过监视从反传播探针soliton的分散波发射的波长来完成的。通过改变泵和探针之间的相对延迟，可以将沿纤维的等离子体密度分布映射。与最近引入的用于监测血浆密度的干涉副作用相比，我们的新技术相对易于由空气湍流和机械振动引起的不稳定性。提出了两个实验的结果，并与数值模拟进行了比较。该技术为许多不同的气体和气体混合物以及在许多其他情况下的分散体变化提供了探测光电离的重要新工具。
We present a pump-probe technique for monitoring ultrafast polarizability changes. In particular, we use it to measure the plasma density created at the temporal focus of a self-compressing higher-order pump soliton in gas-filled hollow-core photonic crystal fiber. This is done by monitoring the wavelength of the dispersive wave emission from a counter-propagating probe soliton. By varying the relative delay between pump and probe, the plasma density distribution along the fiber can be mapped out. Compared to the recently introduced interferometric side-probing for monitoring the plasma density, our new technique is relatively immune to instabilities caused by air turbulence and mechanical vibration. The results of two experiments on argon- and krypton-filled fiber are presented, and compared to numerical simulations. The technique provides an important new tool for probing photoionization in many different gases and gas mixtures as well as ultrafast changes in dispersion in many other contexts.
