FNFT: A Software Library for Computing Nonlinear Fourier Transforms

Abstract

NFTs are well-established theoretical tools in physics and mathematics, but in several areas of engineering they have only recently begun to draw significant attention. An ide-alized fiber-optic communication channel can be described by the NSE, which is solvable with a NFT. In the last few years, there has been much interest in using NFTs for data transmission in optical fibers. We refer to Turitsyn et al. (2017) for a recent review. Several invited papers and tutorials on the topic have been presented at major conferences such as the Optical Fiber Communication Conference and Exhibition (OFC) and the Eu-ropean Conference and Exhibition on Optical Communication (ECOC) in the last few years. Several new research projects, such as the MSCA-ITN COIN or the ERC Starting Grant from which this project is funded (see below), have been initiated. Another area in which NFTs have found practical application is the analysis of waves in shallow water (Osborne 2010; Brühl and Oumeraci 2016). Here, the KdV-NFT is typically used.