Fast nonlinear Fourier transform algorithms using higher order exponential integrators

S Chimmalgi, PJ Prins, S Wahls - IEEE Access, 2019 - ieeexplore.ieee.org
The nonlinear Fourier transform (NFT) has recently gained significant attention in fiber optic
communications and other engineering fields. Although several numerical algorithms for …

Efficient nonlinear Fourier transform algorithms of order four on equispaced grid

V Vaibhav - IEEE Photonics Technology Letters, 2019 - ieeexplore.ieee.org
We explore two classes of exponential integrators, in this letter, to design the nonlinear
Fourier transform (NFT) algorithms with a convergence order of four on an equispaced grid …

Nonlinear Fourier transform for optical data processing and transmission: advances and perspectives

SK Turitsyn, JE Prilepsky, ST Le, S Wahls, LL Frumin… - Optica, 2017 - opg.optica.org
Fiber-optic communication systems are nowadays facing serious challenges due to the fast
growing demand on capacity from various new applications and services. It is now well …

Periodic nonlinear Fourier transform for fiber-optic communications, Part I: theory and numerical methods

M Kamalian, JE Prilepsky, ST Le, SK Turitsyn - Optics express, 2016 - opg.optica.org
In this work, we introduce the periodic nonlinear Fourier transform (PNFT) method as an
alternative and efficacious tool for compensation of the nonlinear transmission effects in …

Higher order convergent fast nonlinear Fourier transform

V Vaibhav - IEEE Photonics Technology Letters, 2018 - ieeexplore.ieee.org
It is demonstrated in this letter that linear multistep methods for integrating ordinary
differential equations can be used to develop a family of fast forward scattering algorithms …

[PDF][PDF] FNFT: A software library for computing nonlinear Fourier transforms

S Wahls, S Chimmalgi, PJ Prins - Journal of Open Source Software, 2018 - joss.theoj.org
The conventional Fourier transform was originally developed in order to solve the heat
equation, which is a standard example for a linear evolution equation. Nonlinear Fourier …

Adaptive trust-region-based algorithm for the discrete eigenvalue evaluation of the direct nonlinear Fourier transform

J He, L Jianping, Y Qin, N Lin, X Yu, Y He, O Xu… - Optics Letters, 2022 - opg.optica.org
We propose an adaptive method for numerical computation of discrete eigenvalues of the
direct nonlinear Fourier transform (NFT). The approach is based on trust region algorithm …

Fast numerical nonlinear Fourier transforms

S Wahls, HV Poor - IEEE Transactions on Information Theory, 2015 - ieeexplore.ieee.org
The nonlinear Fourier transform, which is also known as the forward scattering transform,
decomposes a periodic signal into nonlinearly interacting waves. In contrast to the common …

Combining nonlinear Fourier transform and neural network-based processing in optical communications

O Kotlyar, M Pankratova, M Kamalian-Kopae… - Optics letters, 2020 - opg.optica.org
We propose a method to improve the performance of the nonlinear Fourier transform (NFT)-
based optical transmission system by applying the neural network post-processing of the …

On the accuracy of split-step Fourier simulations for wideband nonlinear optical communications

S Musetti, P Serena, A Bononi - Journal of Lightwave Technology, 2018 - opg.optica.org
We investigate the accuracy of wideband split-step Fourier method (SSFM) simulations by
treating SSFM numerical noise as an additive distributed noise source, much like amplified …