Bursting behaviours in cascaded stimulated Brillouin scattering  

作　　者：Liu Zhan-Jun He Xian-Tu Zheng Chun-Yang Wang Yu-Gang 刘占军;贺贤土;郑春阳;王宇钢(Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;State Key Laboratory of Nuclear Physics and Technology,Center for Applied Physics and Technology,Peking University,Beijing 100871,China)

机构地区：[1]Institute of Applied Physics and Computational Mathematics,Beijing 100094,China [2]State Key Laboratory of Nuclear Physics and Technology,Center for Applied Physics and Technology,Peking University,Beijing 100871,China

出　　处：《Chinese Physics B》2012年第1期310-313,共4页中国物理B（英文版）

基　　金：Project supported by the Science and Technology Funds of China Academy of Engineering Physics(Grant Nos.2010B0102018 and 2010A0102004);the National Basic Research Program of China(Grant No.2010CB832904);the National Natural Science Foundation of China(Grant Nos.10975023,10835003 and 10935003)

摘　　要：Stimulated Brillouin scattering is studied by numerically solving the Vlasov Maxwell system. A cascade of stim- ulated Brillouin scattering can occur when a linearly polarized laser pulse propagates in a plasma. It is found that a stimulated Brillouin scattering cascade can reduce the scattering and increase the transmission of light, as well as intro- duce a bursting behaviour in the evolution of the laser-plasma interaction. The bursting time in the reflectivity is found to be less than half the ion acoustic period. The ion temperature can affect the stimulated Brillouin scattering cascade, which can repeat several times at low ion temperatures and can be completely eliminated at high ion temperatures. For stimulated Brillouin scattering saturation, higher-harmonic generation and wave wave interaction of the excited ion acoustic waves can restrict the amplitude of the latter. In addition, stimulated Brillouin scattering cascade can restrict. the amplitude of the scattered light.Stimulated Brillouin scattering is studied by numerically solving the Vlasov Maxwell system. A cascade of stim- ulated Brillouin scattering can occur when a linearly polarized laser pulse propagates in a plasma. It is found that a stimulated Brillouin scattering cascade can reduce the scattering and increase the transmission of light, as well as intro- duce a bursting behaviour in the evolution of the laser-plasma interaction. The bursting time in the reflectivity is found to be less than half the ion acoustic period. The ion temperature can affect the stimulated Brillouin scattering cascade, which can repeat several times at low ion temperatures and can be completely eliminated at high ion temperatures. For stimulated Brillouin scattering saturation, higher-harmonic generation and wave wave interaction of the excited ion acoustic waves can restrict the amplitude of the latter. In addition, stimulated Brillouin scattering cascade can restrict. the amplitude of the scattered light.

关 键 词：bursting behaviour stimulated Brillouin scattering CASCADE 

分 类 号：O437.2[机械工程—光学工程] O175.26[理学—光学]