Forward Raman scattering of the seed pulse in strongly coupled stimulated Brillouin amplification in plasma

作者：Peng, H.; Zuo, Y. L.; Zhu, H. Y.; Su, J. Q.^*

来源：Physics of Plasmas, 2018, 25(1): 013118.

DOI：10.1063/1.5020327

• PARAMETRIC-INSTABILITIES
• LASER-PULSES
• COMPRESSION

Short laser pulse can be amplified and compressed via strongly coupled stimulated Brillouin scattering (sc-SBS) in plasma. But the sc-SBS amplification is subject to various deleterious instabilities. Here, we present specific analyses on the forward Raman scattering (FRS) of the seed pulse. FRS grows from noises and depletes the seed energy. It causes strong seed modulations and decoherence, which terminate the amplification. The theoretical model of sc-SBS coupled with FRS is investigated. Then, we examine the suppression effects of the density gradient and density random inhomogeneities on FRS. These effects are described well by the numerical simulations and particle-in-cell simulations. Published by AIP Publishing.

• 出版日期2018-1
• 单位上海交通大学; 复旦大学; 中国工程物理研究院; 中国工程物理研究院激光聚变研究中心