脉冲堆积方式产生整形脉冲的逆问题

Inverse Problem of Pulse Shaping by Pulse Stacking

在利用光纤脉冲堆积器进行脉冲时间整形时,存在如何确定光纤脉冲堆积器各路的延时、衰减等参数以产生所需脉冲波形的问题。为此分非相干脉冲堆积和部分相干脉冲堆积两种情况,定量分析了堆积脉冲的特性。在此基础上,提出了一种逆算方法,使得在任意给定时间波形情况下,均可以通过该逆算方法,简单而准确地计算出光纤脉冲堆积器参数。研究结果表明,非相干堆积而成的脉冲波形较为平滑,而部分相干堆积而成的脉冲波形则存在一定的调制;按逆算结果堆积而成的脉冲波形与给定波形符合很好。

For the case of pulse shaping by optical fiber pulse stacker, there exists a problem that how to determine the parameters of optical fiber pulse stacker, such as time delay, attenuation, etc, to generate the temporal pulse shapes required in physical experiments. To solve this problem, the characteristics of incoherent and partially coherent pulse stacking have been analyzed quantitatively. Consequently, an inverse calculation method has been proposed, by which the parameters of optical fiber pulse stacker can be calculated simply and exactly for arbitrary temporal pulse shapes. The results show that the pulses stacked by incoherent pulse stacking are quite smooth, whereas the pulses stacked by partially coherent pulse stacking exhibit slight modulation. Furthermore, the stacked pulse shapes using the proposed inverse calculation method fit the given pulse shapes nicely.