Small-scale self-focusing of 200 ps laser pulses in Brillouin amplification

doi:10.1088/1674-1056/24/9/094210

Abstract Brillouin amplification is a new method to obtain high power hundred-picosecond laser pulses for shock ignition. The laser pulse's intensity can be amplified to 10 GW/cm² through this method. In order to determine the near-field quality, the relationship between the Brillouin amplification gain and the B integral in the stimulated Brillouin scattering (SBS) energy transfer process was studied, and numerical simulations and calculations were carried out to explain the process. For achieving an output intensity of 10 GW/cm² under the condition that the effect of small-scale self-focusing is insignificant in the Brillouin amplification, the influence of the configuration parameters on the Brillouin amplification and the B integral was investigated. The results showed that the 10 GW/cm² high power output can be obtained by optimizing the intensities of the pump and Stokes light and choosing an appropriate SBS medium.

Keywords: Brillouin amplification super transient theory B integral

Received: 18 December 2014
Revised: 29 April 2015
Accepted manuscript online:

PACS:	42.65.-k	(Nonlinear optics)
	42.65.Es	(Stimulated Brillouin and Rayleigh scattering)
	42.65.Jx	(Beam trapping, self-focusing and defocusing; self-phase modulation)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61378007 and 61138005) and the Fundamental Research Funds for the Central Universities, China (Grant No. HIT. IBRSEM. A. 201409).

Corresponding Authors: Wang Yu-Lei, Lü Zhi-Wei
E-mail: wyl@hit.edu.cn;zw_lu@sohu.com

Cite this article:

Yuan Hang (远航), Wang Yu-Lei (王雨雷), Lü Zhi-Wei (吕志伟), Zheng Zhen-Xing (郑振兴) Small-scale self-focusing of 200 ps laser pulses in Brillouin amplification 2015 Chin. Phys. B 24 094210

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Small-scale self-focusing of 200 ps laser pulses in Brillouin amplification

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