调制艾里脉冲传输特性研究

发布时间：2018-06-20 02:30

本文选题：艾里脉冲 + 非线性传输　；参考：《深圳大学》2017年硕士论文

【摘要】：艾里脉冲传输特性是近些年光学研究领域重要的课题之一。与常规的对称的高斯和双曲正割脉冲相比,艾里脉冲不但是一种非对称波包,而且还具有一些独特的性质,如自加速/自减速、无色散和自愈的特性。这些独特的性质导致艾里脉冲在传输过程中呈现出新的特性,同时也为操控非线性光学效应提供了一个新的自由度。本文通过对初始输入的艾里脉冲进行调制,利用解析求解和数值模拟方法,研究了调制艾里脉冲的传输特性。本文主要研究内容与结果如下:1.通过调制输入艾里脉冲频率,使艾里脉冲携带有初始频率啁啾。这种调制方法使得艾里脉冲的时间波形不变,但是其频谱分布由啁啾参量决定。脉冲频谱分布由无调制时的高斯分布变为艾里分布。研究表明,传输特性取决于二阶色散参数和啁啾值是同号还是异号。当两者异号时,啁啾艾里脉冲首先经历压缩过程,接着到达崩塌区域,然后在相反的传输方向上形成新的艾里脉冲。当两者同号时,由于色散效应,啁啾艾里脉冲在传输过程中总是扩散的。相关研究结果发表在Optics Express上。2.通过对输入艾里脉冲的频谱附加二阶相位调制,使得艾里脉冲的频谱分布不变,但是其时间分布则由二阶相位调制决定。研究表明,在线性传输过程中,这种调制艾里脉冲的自加速与自减速特性取决于二阶色散与二阶相位调制是否是同号还是异号。当两者同号时,调制艾里脉冲先加速(或减速)后减速(或加速);当两者异号时,调制艾里脉冲始终是加速(或减速)。在反常色散和非线性的共同作用下,这种调制艾里脉冲辐射孤子的加速与二阶相位调制量的正负决定。为操控孤子的加速和减速提供了一种新方法,同时不需要借助于高阶线性与非线性效应。相关研究结果发表在Scientific Reports上。
[Abstract]:The characteristics of Iris pulse propagation is one of the most important topics in the field of optical research in recent years. Compared with the conventional symmetric Gao Si and hyperbolic cut pulses, the Ellie pulse is not only an asymmetric wave packet, but also has some unique properties, such as self-acceleration / self-deceleration, dispersion free and self-healing. These unique properties lead to the new characteristics of the Alleigh pulse in the transmission process, and also provide a new degree of freedom for the manipulation of nonlinear optical effects. In this paper, the transmission characteristics of the modulated Ellie pulse are studied by using the analytical solution and numerical simulation method. The main contents and results of this paper are as follows: 1. The initial frequency chirp is obtained by modulating the input frequency of the Iris pulse. The modulation method makes the time waveform of the pulse invariable, but the spectrum distribution is determined by the chirp parameter. The pulse spectrum distribution changes from the Gao Si distribution without modulation to the Ellie distribution. It is shown that the transmission characteristics depend on whether the second order dispersion parameters and chirp values are identical or different. When the two signals are different, the chirped Iris pulse first goes through the compression process, then reaches the collapse region, and then forms a new Iris pulse in the opposite direction of transmission. When the two signals are the same, the chirped Iris pulse always diffuses during transmission due to the dispersion effect. The results are published in Optics Express. 2. By adding the second-order phase modulation to the spectrum of the input Ellie pulse, the spectrum distribution of the Iris pulse is invariable, but the time distribution is determined by the second-order phase modulation. It is shown that the self-acceleration and self-deceleration characteristics of the modulated Iris pulse in linear transmission depend on whether the second-order dispersion and second-order phase modulation are identical or not. When the two signals are the same, the modulated Iris pulse accelerates (or slows down) first and then slows down (or accelerates); when the two signals are different, the modulation of the Iris pulse is always an acceleration (or deceleration). Under the joint action of anomalous dispersion and nonlinearity, the acceleration of the radiation soliton and the positive or negative second-order phase modulation are determined. A new method is provided for controlling the acceleration and deceleration of solitons without the aid of higher order linear and nonlinear effects. The results were published in Scientific reports.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O43

【相似文献】