I am looking for a free way to simulate the thermo-optic tuning of an optical waveguide. I have found numerous free optical waveguide modesolvers which I have working well for my desired waveguide structure. Most of these are in Python (preferred, since it's powerful & free).
I have found *some* heat diffusion 2D FEM simulators in Matlab (which is NOT free!). I suppose I can combine these if I know the thermoptic coefficients of my waveguide materials (I do know these).
Have any of you seen freely available code/software to simulate the group/effective index change in a waveguide with applied heat (or even better, applied current)?
Partial tools I've found so far:
Python mode solvers:
– CAMFR: https://github.com/demisjohn/CAMFR
– EMpy: http://lbolla.github.io/EMpy/
– Python MEEP: https://github.com/FilipDominec/python-meep-utils
Matlab Thermal Solvers (would much prefer Python):
I *think* these simulate a 2D heat transfer, haven't them tried yet.
– https://www.mathworks.com/discovery/finite-element-analysis.html
– https://www.mathworks.com/help/pde/ug/heat-equation-for-metal-block-with-cavity-pde-app.html
I think this simulators will be useful to you ( is NOT free!)
COMSOL Multiphysics® Modeling Software
Perhaps you could try the FDTD Method, where temperature induced index perturbation is modeled. The following URL might be helpful.
Well, also the software is commercial and is not free actually. Perhaps the model and method could be helpful; or you may use the trial version or check if your institution has the license.
https://kb.lumerical.com/en/ref_sim_obj_index_perturbation_material.html
Thank you both, I am aware of Lumerical, COMSOL (which definitely does this), PhotonDesign, RSoft, Matlab, Phoenix, but am looking for something Free as these packages are quite expensive. I can’t use an academic license for non-academic work, so can’t use the software provided by the University.
Indeed a few week trial may work for a one-time simulation.
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