期刊
PLASMA PHYSICS AND CONTROLLED FUSION
卷 65, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6587/ad02bd
关键词
frequency modulations; stimulated Brillouin scattering; inhomogeneous plasmas
The effects of frequency-modulated pump on stimulated Brillouin scattering (SBS) in a flowing plasma were investigated using theoretical analysis, three-wave simulations, and kinetic simulations. It was found that a certain frequency modulation increased the SBS reflectivity by making the resonant points' velocity similar to the group velocity of the seed laser. SBS could also be suppressed by frequency modulation with larger bandwidth. Additionally, multi-location autoresonance was observed in the narrow-bandwidth frequency modulation case, which further increased the SBS reflectivity.
The effects of a frequency-modulated pump on stimulated Brillouin scattering (SBS) in a flowing plasma are investigated by theoretical analysis, three-wave simulations, and kinetic simulations. The resonance point of SBS oscillates in a certain spatial region with time when frequency modulations are applied. There exists a certain frequency modulation that causes the velocity of resonant points to be similar to the group velocity of the seed laser, which increases the SBS reflectivity. The SBS can also be suppressed by frequency modulation with larger bandwidth. In the kinetic simulations, the effects of the frequency-modulated pump on the reflectivity agree with our theoretical predictions. Multi-location autoresonance is also observed in the narrow-bandwidth frequency modulation case, which can also increase the SBS reflectivity. Our work provides a method for selecting the laser bandwidth to inhibit SBS in inhomogeneous plasmas.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据