基于怪波实现光脉冲串的全光放大

Amplification of optical pulse train based on Peregrine rogue wave

本文基于非线性薛定谔方程的Peregrine怪波解,讨论有理分式的脉冲动力学,基于其特性并利用谱过滤方法,提出一种光脉冲串的放大方法.连续波泵浦与频谱过滤器相结合,能够实现光放大器作用.这一思路被应用到光脉冲串的长距离传输,以4级放大为例,实现了光脉冲串的级联放大,并且通过矩形脉冲截断,能够实现有限个数脉冲的放大.其次,以实验上可控的周期调制的平面波作为初始输入,能够产生放大脉冲串,且最大放大脉冲串产生的位置与调制强度有关.改变调制强度的大小,能够影响最大放大脉冲串所产生的位置.研究结果表明,对于不同频率的输入脉冲串,利用此方法可以实现放大,并且通过改变调制强度的大小,能够实现两路不同频率信号的同时放大.

In this paper,we discuss the pulse dynamics of rational fraction based on the Peregrine rogue wave solution of nonlinear Schrödinger equation.Based on its properties and using the spectral filtering,the amplification of optical pulse train is proposed.The results show that the combination of a continuous-wave pump and a spectral filter positioned in fiber can act as an amplifier.And the idea is applied to the long-haul transmission of optical pulse train and four amplification periods are demonstrated.Particularly,the amplification of limited number of pulses can be realized by rectangular pulse truncation and the number of pulses can be adjusted by changing the parameters.The periodically modulated plane wave that can be controlled experimentally is taken as an input which can produce the maximumly amplified zero background pulse train and the location of maximumly amplified pulse train relates to the modulation intensity.The location of the maximumly amplified zero background pulse train changes with the modulation intensity.The results show that for two input signals with different frequencies,they can realize the amplification with the above method.By changing the modulation intensity the simultaneous amplification for two signals with different frequencies can be realized.