Stimulated Brillouin scattering of backward stimulated Raman scattering

Qingsong Feng; Lihua Cao; Zhanjun Liu; Chunyang Zheng; Xiantu He

doi:10.1038/s41598-020-59727-4

Stimulated Brillouin scattering of backward stimulated Raman scattering

Sci Rep. 2020 Feb 26;10(1):3492. doi: 10.1038/s41598-020-59727-4.

Authors

Qingsong Feng¹, Lihua Cao^{2

3

4}, Zhanjun Liu^{1

5}, Chunyang Zheng^{6

7

8}, Xiantu He^{1

5

9}

Affiliations

¹ Institute of Applied Physics and Computational Mathematics, Beijing, 100094, China.
² Institute of Applied Physics and Computational Mathematics, Beijing, 100094, China. cao_lihua@iapcm.ac.cn.
³ HEDPS, Center for Applied Physics and Technology, Peking University, Beijing, 100871, China. cao_lihua@iapcm.ac.cn.
⁴ Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai, 200240, China. cao_lihua@iapcm.ac.cn.
⁵ HEDPS, Center for Applied Physics and Technology, Peking University, Beijing, 100871, China.
⁶ Institute of Applied Physics and Computational Mathematics, Beijing, 100094, China. zheng_chunyang@iapcm.ac.cn.
⁷ HEDPS, Center for Applied Physics and Technology, Peking University, Beijing, 100871, China. zheng_chunyang@iapcm.ac.cn.
⁸ Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai, 200240, China. zheng_chunyang@iapcm.ac.cn.
⁹ Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai, 200240, China.

Abstract

The rescattering of backward stimulated Raman scattering (BSRS) by stimulated Brillouin scattering (SBS) is found in the high electron density region by relativistic Vlasov-Maxwell simulation and particle-in-cell (PIC) simulation, where the BSRS is in the regime of absolute instability and dominates in all the scatterings. Both one dimension (1D) Vlasov simulation and two dimension (2D) PIC simulation have been given to verify that there exists SBS of BSRS in the regime of absolute instability for BSRS. The SBS of BSRS will be even stronger than forward stimulated Raman scattering (FSRS) and SBS in regime of absolute instability for BSRS. Thus, besides Langmuir decay instability and laser energy absorption, the SBS of BSRS is also an important saturation mechanism of BSRS in high electron density region.