The following softwares and Matlab/Octave toolboxes are available at
download. They are distributed under the
under French law and abiding by the rules of distribution of
free software.
S
SHIPOL : a Matlab
program for simulation of light-wave propagation in high-power fiber
lasers
SHIPOL is a Matlab program for simulation of light-wave propagation in a
double-clad rare-earth-doped fiber-laser based. It is based on the
rate-equation theory that describes the distributions of
inversion populations and optical powers along the fiber when a
stationary regime has been attained. The specificity of the boundary
value problem (BVP) stemming from the rate-equation theory is that the
boundary conditions are note separated due to the reflection of the
laser signal by Bragg mirrors at the two fiber ends. This numerical
difficulty is overcome by a reformulation of the BVP in an equivalent
BVP with separated BC, thereby opening the possibility of using Matlab
BVP solvers.
This software is governed by the
CeCILL
license under French law and abiding by the rules of distribution
of free software.
Snapshot of the SHIPOL program results
for the propagation in a singlemode Ytterbium doped optical fiber.
Download :
Toolbox as a zip archive from HAL
SPIP : a computer
program for the simulation of light-wave propagation in optical
fibre
SPIP is a portable command-line driven utility written in C language for
Linux and MS-Windows aimed at solving the Generalized Non-Linear
Schrõdinger Equation (GNLSE) as well as the Non-Linear Schrõdinger
Equation (NLSE) involved in optics in the modelling of light-wave
propagation in a passive optical fibre.
In the SPIP program is implemented the Interaction Picture method, a new
efficient alternative method to the Symmetric Split-Step method together
with a dedicated costless adaptive step-size control based on the use of
a 4th order embedded Runge-Kutta method.
This software is governed by the
CeCILL
license under French law and abiding by the rules of distribution
of free software. It has been published in Computer Physics
Communications in 2015.
Snapshots of the SPIP program results
for the propagation of a 10th order Soliton in a SMF-28 fiber.
Download :
SPIP executable and sources archive
(release 1.1)
SPIP documentation
You can refer to this program as
:
S. Balac and A. Fernandez,
SPIP: A computer program implementing the Interaction Picture method
for simulation of light-wave propagation in optical fibre,
Computer Physics Communications, 2015.
(DOI :
10.1016/j.cpc.2015.10.012)
WGMode : a Matlab Toolbox dedicated
to the study of whispering gallery modes in optical micro-spheres
The
WGMode Matlab Toolbox is constituted of various Matlab scripts to
study whispering gallery modes in optical micro-spheres. These scripts
allow to explore resonance conditions for TE or TM modes, to visualize
whispering gallery TE or TM modes in a micro-sphere and to compute the
volume of any given mode. Namely, the WGMode Matlab Toolbox contains
the following Matlab scripts :
- ELLRES computes, for
a given wavelength, the values of the mode index for which a
resonance occurs
- WVLRES computes, for
a given couple of mode index $(\ell,m)$, the values of the
wavelength for which a resonance occurs
- VOLMOD computes the
volume of a whispering gallery TE or TM modes in a micro-sphere
- PLTMOD plot the
whispering gallery modes
This toolbox is governed by the
CeCILL
license under French law and abiding by the rules of distribution
of free software.
Various
representation of the TE mode with indexes l=271, m=271 and
wavelength 804.57 nm
in a micro-sphere with radius
25 μm and optical index 1.453
Download :
WGMode Toolbox as
a ZIP archive from Mendeley Data,
WGMode documentation
You can refer to this program as
:
S. Balac.
WGMode :
A Matlab toolbox for whispering gallery modes volume computation in
spherical optical micro-resonators
Computer Physics Communications (243, 121-134 (2019)
DOI:10.1016/j.cpc.2019.05.002
ARAMIS : a Matlab program for the numerical
simulation of metallic implant induced artifacts in magnetic resonance
imaging
We have developed a Matlab program that simulates both the
susceptibility and the eddy current artifacts in the case of a metallic
implant with spherical shape (for such geometry, analytical expressions
for the induced RF and static magnetic fields are known). These two
kinds of artifact add to the MRI image without our knowing of the
contribution of each one to the image distortion. Our program enables to
hide one of the two artifacts and image the other or image the effects
of the two artifacts together. It is then possible to compare for
different materials the importance of each source of image distorsion.
This program is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software.
MRI
artifact generated by a ball of Titanium simulated with the
ARAMIS program.
Susceptibility artifact on
the left picture, RF artifact on the center picture and the actual
artifact on the right combination of both effects.
Details on the mathematical modeling from where the Matlab program
originates can be obtained in the following articles :
