Max Planck Institute for the Science of Light, Erlangen, Germany.
Phys Rev Lett. 2011 Nov 11;107(20):203901. doi: 10.1103/PhysRevLett.107.203901. Epub 2011 Nov 7.
By using a gas-filled kagome-style photonic crystal fiber, nonlinear fiber optics is studied in the regime of optically induced ionization. The fiber offers low anomalous dispersion over a broad bandwidth and low loss. Sequences of blueshifted pulses are emitted when 65 fs, few-microjoule pulses, corresponding to high-order solitons, are launched into the fiber and undergo self-compression. The experimental results are confirmed by numerical simulations which suggest that free-electron densities of ∼10(17) cm(-3) are achieved at peak intensities of 10(14) W/cm(2) over length scales of several centimeters.
通过使用充气 kagome 结构光子晶体光纤，研究了光致电离条件下的非线性光纤光学。该光纤在宽带宽和低损耗下呈现出低反常色散。当将 65fs、几微焦耳的脉冲（对应于高阶孤子）注入光纤并进行自压缩时，会发射出一系列蓝移脉冲。实验结果得到了数值模拟的证实，表明在几厘米的长度范围内，峰值强度为 10(14)W/cm(2)时，可以实现约 10(17)cm(-3)的自由电子密度。
