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

作　　者：远航 王雨雷 吕志伟 郑振兴 

机构地区：[1]National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology

出　　处：《Chinese Physics B》2015年第9期267-270,共4页中国物理B（英文版）

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

摘　　要：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/cm^2 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/cm^2 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/cm^2 high power output can be obtained by optimizing the intensities of the pump and Stokes light and choosing an appropriate SBS medium.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/cm^2 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/cm^2 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/cm^2 high power output can be obtained by optimizing the intensities of the pump and Stokes light and choosing an appropriate SBS medium.

关 键 词：Brillouin amplification super transient theory B integral 

分 类 号：O437.2[机械工程—光学工程]