【摘要】 针对受激布里渊散射(SBS)脉冲压缩系统中经常出现的波形调制现象,提出一种抑制调制、改善窄脉冲波形质量的新方法——双级SBS脉冲压缩结构。此方法以"两次压缩,子峰能量主峰提取"为控制手段,能够解决输出脉冲的多峰调制问题,有望成为获得高压缩比、高质量窄脉冲的一种新途径。提出并建立双级SBS脉冲压缩系统物理模型和数值计算模型,并利用典型SBS介质CCl4和FC-72开展了实验研究,获得无调制单峰结构的压缩脉冲,并与理论模拟结果符合较好。更多还原

【Abstract】 A novel method,two-step stimulated Brillouin scattering(SBS) structure,was put forward to controlling modulation and improving pulse shape quality in the SBS pulse compression system.And this method,which uses two compression stages to extract sub-peaks’ energy to the peak,is likely to be a new approach to obtain pulses with short duration and high shape quality.The performance of the two-step SBS pulse compression system were investigated theoretically and experimentally.The experiment investigation was conducted using CCl4 and FC-72 as the SBS media.High-quality pulse shapes with no modulation were obtained,which agrees well with the simulation results.更多还原