双级受激布里渊散射压缩获得高质量窄脉冲波形
High-quality pulse shape realized in two-step stimulated Brillouin scattering pulse compression system
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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。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.
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Key words:
- stimulated brillouin scattering /
- pulse compression /
- modulation /
- pulse shape
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