MODE Solutions includes 3 solvers.
The Finite Difference Eigenmode solver.
The 2.5D variational FDTD solver and The Bidirectional Eigenmode Expansion solver.
In this course, we will focus on the FDE solver.
The FDE solver can be used to characterize the supported modes of light-guiding structures,
to obtain results such as the mode profile, the effective index, loss, dispersion, group
The FDE solver can also be used to optimize the power coupling between modes.
Some built-in analysis tools for sweeps and overlap can be used with the FDE solver.
The FDE solver can deal with structures where the cross section is uniform (straight or
bent), or helical with a uniform period along the direction of propagation.
On the other hand, you cannot use the FDE solver for structure where the cross section
is varying, such as a taper, for example, where you may use the variational FDTD solver
or the Eigenmode Expansion solver.
In the next unit, we will discuss the basic workflow of the FDE solver.