About
thermo-optic simulations:
The starting point of all optical simulations is to obtain the correct
refractive index distribution of the structure. The operation principle
of many planar waveguide devices is based on a small locally induced perturbation
of the refractive index. To predict and optimize the optical performance
of devices requires calculation of the correct refractive index perturbation
to be taken into account for subsequent optical simulations.
The thermo-optic (TO) module calculates the index perturbation in thermally
activated devices, such as thermally activated Variable Optical Attenuators
(VOA).
Benefits TO module:
 The
thermal distribution is calculated using a fast Finite Difference solver.
The refractive index perturbation is calculated automatically by multiplying
the thermal distribution by the thermo-optic coefficients of the materials
used. This perturbation is conveniently added to the index distribution
of the basic structure for subsequent optical simulations using any of
the mode solver or propagation modules.
Application
examples:
The following application notes demonstrate the capabilities of our thermo-optic
module:
 Design of a Thermo-Optic Switch
Thermo-optic DOS switch
Features:
- Fast Finite Difference
based thermal solver
- Transient temperature
solving
- Adaptive (non-equidistant)
grid
- Multiple heater
electrodes
Generic
features:
- Refractive index
perturbation can be used in mode solver or propagation modules
- Extensive parameterization
capabilities
- Vary runs
- Material library
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