Mitigating the relativistic laser beam filamentation via an elliptical beam profile.
作者： T. W. Huang , C. T. Zhou , A. P. L. Robinson , B. Qiao , H. Zhang
DOI: 10.1103/PHYSREVE.92.053106
关键词: Laser 、 Plasma channel 、 Laser power scaling 、 Modulational instability 、 Filamentation 、 Laser beam quality 、 Beam parameter product 、 Beam (structure) 、 Optics 、 Physics
摘要: It is shown that the filamentation instability of relativistically intense laser pulses in plasmas can be mitigated case where beam has an elliptically distributed profile. A high-power elliptical Gaussian would break up into a regular pattern-in contrast to randomly filaments circularly beam-and much more power concentrated central region. highly experiences anisotropic self-focusing and diffraction processes plasma channel ensuring unstable diffractive rings circular cannot produced. The azimuthal modulational thereby suppressed. These findings are verified by three-dimensional particle-in-cell simulations.
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