Power-scalable subcycle pulses from laser filaments
Power-scalable subcycle pulses from laser filaments
复制标题
来自激光灯丝的功率可扩展的子周期脉冲
作者：
A. Voronin;A. Zheltikov
使用非线性光学方法将光脉冲压缩为超短脉冲宽度是现代激光科学的一项成熟技术。然而，将这些方法扩展到具有高峰值功率的脉冲（由于激光技术的快速进步而变得可行）受到通用物理原理的限制。超短激光脉冲的峰值功率 P 与自聚焦临界功率 Pcr 的比值 P/Pcr 起着非线性薛定谔方程的基本运动粒子数积分的作用，保持该比值恒定是激光诱导成丝功率缩放的关键原则。然而，在这里，我们表明，尽管潜在的非线性物理非常复杂，反常色散状态下的丝化辅助超短激光脉冲的自压缩可以根据恒定 P/Pcr 的原理在较宽的峰值功率范围内缩放。我们确定了丝化自压缩缩放策略，从而可以生成具有几乎恒定脉冲宽度的子周期场波形，而不会在宽范围的峰值功率（从几个到数百个 Pcr）内大幅降低光束质量。
Compression of optical pulses to ultrashort pulse widths using methods of nonlinear optics is a well-established technology of modern laser science. Extending these methods to pulses with high peak powers, which become available due to the rapid progress of laser technologies, is, however, limited by the universal physical principles. With the ratio P/Pcr of the peak power of an ultrashort laser pulse, P, to the critical power of self-focusing, Pcr, playing the role of the fundamental number-of-particles integral of motion of the nonlinear Schrödinger equation, keeping this ratio constant is a key principle for the power scaling of laser-induced filamentation. Here, we show, however, that, despite all the complexity of the underlying nonlinear physics, filamentation-assisted self-compression of ultrashort laser pulses in the regime of anomalous dispersion can be scaled within a broad range of peak powers against the principle of constant P/Pcr. We identify filamentation self-compression scaling strategies whereby subcycle field waveforms with almost constant pulse widths can be generated without a dramatic degradation of beam quality within a broad range of peak powers, varying from just a few to hundreds of Pcr.
影响因子：
64.8
作者：
Schultze, Martin;Bothschafter, Elisabeth M.;Krausz, Ferenc
通讯作者：
Krausz, Ferenc
影响因子：
56.9
作者：
Wirth, A.;Hassan, M. Th.;Goulielmakis, E.
通讯作者：
Goulielmakis, E.
影响因子：
35
作者：
Pupeza, I.;Sanchez, D.;Biegert, J.
通讯作者：
Biegert, J.