双布里渊放大池放大控制脉冲波形的研究

Pulse shape control by Brillouin amplification of two Brillouin amplifiers

提出一种主放大池与修整放大池相结合的双布里渊放大池放大控制脉冲波形的新方法.在主放大池中,通过调节抽运光与种子光的延迟时间,完成对脉冲波形的整体控制;而在修整放大池中,通过调节双池间距,完成对脉冲波形、尤其是对脉冲前沿的微调.实验研究了双池间距对脉冲波形的影响,得到脉冲波形随双池间距的变化规律.结果表明:相遇时间及双池间距是控制脉冲波形最重要的参数.此双布里渊放大池系统可以方便地控制脉冲波形,尤其可以微调脉冲前沿.

A novel scheme using a main Brillouin amplifier in combination with a reshaping Briilouin amplifier is suggested to control the stimulated Briilouin scattering pulse shape. In this scheme, the main amplifier coarsely controls the pulse shape by changing the delay time between the pump and the Stokes seed, and the reshaping amplifier fine-tunes the pulse shape, especially the rise edge of the pulse by adjusting the distance between the two ceils. Dependence of the pulse shape on the distance between the two amplifiers is experimentally researched. The results show that the encounter time and the distance between two amplifiers are the most important parameters for controlling the pulse shape. This scheme is a simple and efficient way to precisely control the pulse shape.