GNLStools.py is a Python module containing data structures and functions for
simulation and analysis of the propagation dynamics of laserpulses in nonlinear
waveguides, described by the generalized nonlinear Schrödinger equation.
The provided software implements the effects of linear dispersion, pulse self-steepening, and the Raman effect. Input pulse shot noise can be included using commonly adopted quantum noise models considering both, pure spectral phase noise as well as Gaussian noise, and coherence properties of the resulting spectra can be calculated.
We include examples, demonstrating the functionality of the software by reproducing results for a supercontinuum generation process in a photonic crystal fiber, documented in the scientific literature.
GNLStools is developed under python3 (version 3.9.7) and requires the
functionality of
- numpy (1.21.2)
- scipy (1.7.0)
Further, the figure generation scripts included with the examples require the functionality of
- matplotlib (3.4.3)
GNLStools can be used as an extension module for
py-fmas, allowing a user to take
advantage of variable stepsize z-propagation algorithms.
The GNLStools presented here are derived from our research software and meant
to work as a (system-)local software tool. There is no need to install it once
you got a local
clone
of the repository, e.g. via
$ git clone https://github.com/omelchert/GNLStools
The figure above shows exemplary results for a supercontinuum generation process, obtained for input pulses of different duration. The right y-axis shows the spectrum avereaged over 200 indepenent instances of input pulse noise, and the left axis shows the standard error of the mean when taking into account a number of M independed instances of noise.
The `GNLStools' software package is described in
O. Melchert, A. Demircan, "GNLStools.py: A generalized nonlinear Schrödinger Python module implementing different models of input pulse quantum noise," SoftwareX 20 (2022) 101232, DOI: 10.1016/j.softx.2022.101232; arXiv.2206.07526v1.
The presented software has been extensively used in our research work, including the study of supercontinuum generation and higher-order soliton compression in diamond waveguides
O. Melchert et al., "Soliton compression and supercontinuum spectra in nonlinear diamond photonics," arXiv.2211.00492v1.
This project is licensed under the MIT License - see the LICENSE.md file for details.
This work received funding from the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering – Innovation Across Disciplines) (EXC 2122, projectID 390833453).