抽运光对双布里渊放大池放大控制脉冲波形的影响

The influence of pump power on pulse shape control by Brillouin amplification of two Brillouin amplifiers

在传统的独立双池结构的受激布里渊相位共轭镜中,引入修整放大池,采用主放大池与修整放大池相结合的双布里渊放大池结构控制脉冲波形,主放大池控制脉冲的整体波形,而修整放大池对脉冲波形进行微调.研究了抽运光功率密度对双布里渊放大池放大控制脉冲波形的影响,得到了不同抽运光功率密度下,脉冲波形随双池间距的变化规律.研究表明,抽运光功率密度决定了种子光的放大效率,是控制脉冲波形的重要参数.

A reshaping Brillouin amplifier is combined with the main Brillouin amplifier in the conventional stimulated Brillouin scattering （SBS） phase conjugation mirror （PCM）, which can control the SBS pulse shape, the main amplifier controls the pulse shape roughly, while the reshaping amplifier can control it finely. Effect of pump on pulse shape is studied, and the dependence of the pulse shape on the distance between the two amplifiers is achieved at various pump intensities. Results show that the pump intensity determines the amplifying efficiency of the seed, and that it is an important parameter to control the pulse shape.