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arXiv 2006.02558nlin.PSmath-phmath.MP
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随机非线性Schr方程离散特征值的若干结果纤维光学中的厄丁格方程

Some results on discrete eigenvalues for the Stochastic Nonlinear Schroedinger Equation in fiber optics

Laura Prati, Luigi Barletti

摘要:

利用非线性傅立叶变换研究了带加性高斯白噪声的随机非线性薛定谔方程。特别是,我们专注于离散特征值沿聚焦光纤的传播。由于随机NLSE是不完全可积的NFT的装置,然后我们使用扰动的方法,其中我们假设的信噪比是高的。零阶扰动导致确定性NLSE,而一阶扰动允许描述离散特征值的统计。这对于理解最近设计的光传输技术的信道特性是重要的,其中信息被编码在非线性傅立叶频谱中。

英文摘要:

We study a stochastic Nonlinear Schroedinger Equation (NLSE), with additive white Gaussian noise, by means of the Nonlinear Fourier Transform (NFT). In particular, we focus on the propagation of discrete eigenvalues along a focusing fiber. Since the stochastic NLSE is not exactly integrable by means of the NFT, then we use a perturbation approach, where we assume that the signal-to-noise ratio is high. The zeroth-order perturbation leads to the deterministic NLSE while the first-order perturbation allows to describe the statistics of the discrete eigenvalues. This is important to understand the properties of the channel for recently devised optical transmission techniques, where the information is encoded in the nonlinear Fourier spectrum.

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