论文部分内容阅读
基于高功率激光系统前端全光纤脉冲整形系统输出的脉冲特性,以两路脉冲堆积为例,理论分析并讨论了光纤中群速度色散的作用,提出了分离距离的概念,得出了整形脉冲时间调制周期、瞬时频率,以及初始啁啾对脉冲波形影响的解析结果。数值模拟了脉冲波形、瞬时频率在正、负色散光纤中随时间的变化特性,以及时间调制周期与传输距离之间的关系。结果表明,堆积脉冲不同位置瞬时频率变化不同;脉冲时间调制周期与时延和初始啁啾以及色散符号有关。
Based on the pulse characteristics of full-fiber pulse shaping system in front of high-power laser system, taking the two-pulse accumulation as an example, the effect of group velocity dispersion in fiber is theoretically analyzed and the concept of separation distance is proposed. The pulse shaping time Modulation cycle, instantaneous frequency, and the initial chirp on the pulse waveform analysis of the results. Numerical simulation of the pulse waveform, instantaneous frequency in positive and negative dispersion fiber with time characteristics, as well as the time modulation cycle and the relationship between the transmission distance. The results show that the instantaneous frequency changes at different positions of the impulsive pulse are different. The impulsive time modulation period is related to the delay and the initial chirp as well as the dispersion symbols.