计算物理 ›› 2007, Vol. 24 ›› Issue (3): 373-377.

• 论文 • 上一篇    

不同形式非线性薛定谔方程及其分步傅里叶法求解

吕理想, 张晓萍   

  1. 兰州大学信息科学与工程学院, 甘肃 兰州 730000
  • 收稿日期:2006-02-16 修回日期:2006-07-24 出版日期:2007-05-25 发布日期:2007-05-25
  • 作者简介:吕理想(198l-),男,浙江永康,硕士生,从事WDM光传送网的信号传输损伤效应及选路和波长分配算法的研究,兰州大学信息科学与工程学院现代通信技术研究所730000.
  • 基金资助:
    甘肃省自然科学基金(ZS031-A25-013-G)资助项目

Different Forms of Nonlinear Schrödinger Equation and Solutions Using Split Step Fourier Method

LÜ Lixiang, ZHANG Xiaoping   

  1. School of Information Science & Engineering, Lanzhou University, Lanzhou 730000, China
  • Received:2006-02-16 Revised:2006-07-24 Online:2007-05-25 Published:2007-05-25

摘要: 讨论光通信中脉冲的准单色光光场的正负频表示,正负频形式的傅里叶变换,正负频形式的非线性薛定谔方程及它们之间的关系.尤其在脉冲频谱的求解问题中,如果采用负频形式的非线性薛定谔方程则必须选取负频形式的傅里叶变换;如果采用正频形式的非线性薛定谔方程则必须选取正频形式的傅里叶变换.采用分步傅里叶法对具体实例进行数值求解,验证了讨论结果.

关键词: 非线性薛定谔方程, 傅里叶变换, 分步傅里叶法

Abstract: The positive and negative frequency expressions of quasi-monochromatic optical fields of a pulse in fiber-optic communication and the positive and negative frequency forms of Fourier transformations and nonlinear Schrödinger(NLS) equations are discussed.Especially,in the solution of pulse spectrum,the negative frequency form of NLS equation should be solved by the negative frequency form of Fourier transformation,while the positive frequency form of NLS equation is solved by the positive frequency form of Fourier transformation.An example is given using split step Fourier method.

Key words: nonlinear Schrödinger equation, Fourier transformation, split step Fourier method

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