Backward Raman amplification in plasmas with chirped wideband pump and seed pulses
Wu Zhao-Hui (吴朝辉)a b c, Wei Xiao-Feng (魏晓峰)b, Zuo Yan-Lei (左言磊)b, Liu Lan-Qin (刘兰琴)b, Zhang Zhi-Meng (张智猛)b, Li Min (李敏)b, Zhou Yu-Liang (周煜梁)b, Su Jing-Qin (粟敬钦)a
a Department of Electric-optics, Nanjing University of Science and Technology, Nanjing 210094, China;
b Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;
c Science and Technology on Plasma Physics Laboratory, Mianyang 621900, China
Chirped wideband pump and seed pulses are usually considered for backward Raman amplification (BRA) in plasmas to achieve an extremely high-power laser pulse. However, current theoretical models only contain either a chirped pump or a chirped seed. In this paper, modified three-wave coupling equations are proposed for the BRA in the plasmas with both chirped wideband pump and seed. The simulation results can more precisely describe the experiments, such as the Princeton University experiment. The optimized chirp and bandwidth are determined based on the simulation to enhance the output intensity and efficiency.
Project supported by the National Natural Science Foundation of China (Grant No. 11305157) and the Development Foundation of China Academy of Engineering Physics Laboratory (CAEPL) (Grant No. 2013A0401019).
Corresponding Authors:
Su Jing-Qin
E-mail: sujingqin@hotmail.com
Cite this article:
Wu Zhao-Hui (吴朝辉), Wei Xiao-Feng (魏晓峰), Zuo Yan-Lei (左言磊), Liu Lan-Qin (刘兰琴), Zhang Zhi-Meng (张智猛), Li Min (李敏), Zhou Yu-Liang (周煜梁), Su Jing-Qin (粟敬钦) Backward Raman amplification in plasmas with chirped wideband pump and seed pulses 2015 Chin. Phys. B 24 014211
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