Mode Solvers
FIMMWAVE offers several different mode solvers, each adapted
and optimised to solve a type of waveguides.
The solvers currently implemented in FIMMWAVE are:
The FMM Solver
This solver, based on the Film Mode Matching method, is optimised for rectangular waveguide structures.
The FDM Solver
Based on an advanced finite-difference algorithm; this solver is ideal
for metallic or absorbing structures. It can accurately model waveguides
with high-step refractive index profiles, slanting/curved interfaces and
gradient profiles.
The FEM Solver
A mode solver based on the finite-element method, ideal for complex geometries,
especially with curved interfaces, e.g. photonic crystal fibres. Offered as an optional add-on to the FIMMWAVE base module.
The Effective Index Solver
Based on the Effective Index Approximation, this is a very fast solver for
quasi-2D structures.
Fibre Solvers
FIMMWAVE offers a variety of Fibre Solvers to solve any kind
of profile with a circular symmetry. Some of them are offered as an
optional add-on to the FIMMWAVE base module.
All the mode solvers are compatible with
FIMMPROP, our
innovative EigenMode-Expansion propagation tool.
Complex versions are available for
most solvers, allowing losses and even metals to be modelled.
Bend modes can be calculated using the FMM, FDM
and FEM Solvers with the Complex Engine.
Full Mode Solver Feature Table
(PDF)
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