Enhanced strong-coupling stimulated Brillouin amplification assisted by Raman amplification

Y. Chen, C. Y. Zheng, Z. J. Liu, L. H. Cao, and C. Z. Xiao
Phys. Rev. E 107, 015204 – Published 17 January 2023

Abstract

Higher intensity of strong-coupling stimulated Brillouin scattering (SC-SBS) amplification is achieved by supplementary Raman amplification. In this scheme, a Raman pump laser first amplifies the seed pulse in the homogeneous plasma, and then a SC-SBS pump laser continues the amplification in the inhomogeneous plasma in order to suppress the spontaneous instability of pump lasers. The intensity of the seed laser gets higher and the duration of the seed laser gets shorter than that in the pure SC-SBS scheme with the same incident energy, while the energy conversion efficiency is not significantly reduced. We also found that the SC-SBS amplification is seeded by the leading pulse of Raman amplification. The results obtained from envelope coupling equations, Vlasov simulations, and two-dimensional particle-in-cell simulations agree with each other. This scheme offers a possible way to improve the SC-SBS amplification in experiments.

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  • Received 27 September 2022
  • Accepted 27 December 2022

DOI:https://doi.org/10.1103/PhysRevE.107.015204

©2023 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

Y. Chen1,2, C. Y. Zheng3,4,5, Z. J. Liu3,4, L. H. Cao3,4,5, and C. Z. Xiao2,5,*

  • 1School of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
  • 2Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China
  • 3Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
  • 4HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
  • 5Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China

  • *xiaocz@hnu.edu.cn

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Vol. 107, Iss. 1 — January 2023

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