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RSoft FemSIM FEM
FEM design tool to analyze and simulate transverse and cavity modes
Calculate Transverse or Cavity Modes with a Full-Vector Solution
Manage costs and timelines and improve design by identifying problems early with RSoft FemSIM FEM, a full-vector simulation tool that can calculate any number of transverse or cavity modes of an arbitrary structure on a non-uniform hybrid mesh of triangles and rectangles. Based on the finite element method (FEM), FemSIM — can help your team address numerous applications ranging from high-index contrast profiles to lossy structures and silicon photonic devices.
- Model and analyze a broad range of devices with FemSIM FEM design tool’s advanced algorithm.
- Pinpoint and solve for a structure’s guided, leaky, and radiation modes.
- Optimize designs with insights into how different parameters affect system performance.
Key Features of RSoft FemSIM FEM
Full-vector analysis
FemSIM is a finite element method design tool that’s fully vectoral, using Cartesian or cylindrical coordinate systems to simulate and solve complex problems.
RSoft CAD integration
Fully integrated in the RSoft CAD Environment, FemSIM FEM works seamlessly with RSoft’s other passive device simulation tools.
Robust meshing scheme
Accurately model complex geometries with hybrid triangular and rectangular mesh elements. Avoid spurious modes with first and second order elements.
Advanced computing
Compute high-order modes and dispersion diagrams. Generate field profiles, propagation constants, overlap integrals, confinement factors, and diagnostics.
Effective boundary conditions
The FemSIM FEM design tool includes perfectly matched layer (PML) and symmetric/anti-symmetric boundary conditions.
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RSoft FemSIM FEM Design Tool – FAQ
FemSIM is a finite element method design tool that can calculate transverse or cavity modes of an arbitrary structure on a non-uniform mesh.
FemSIM has applications for mode solving across a wide array of integrated and nano-optic devices including:
- Structures with arbitrary profiles, including those with curved or uncommon shapes
- Structures with high-index contrast and/or small feature sizes
- Air or solid core photonic fibers
- Lossy structures
- Silicon-based devices such as silicon on insulators (SOIs)
- Polarization rotators
- Plasmonic waveguides
- Laser and photonic bandgap defect cavities
FemSIM FEM design tool is fully vectoral with numerous feature enhancements that can compute complex modes. The general mode solver can find any number of guided and leaky transverse modes of a structure. This includes modes for high-index contrast structures such as SOIs, leaky structures such as air core fibers, and other structures such as photonic crystal fibers and highly hybrid structures. Modes found for these structures can be used in propagation analysis in other Keysight RSoft tools such as BeamPROP and FullWAVE. Engineering teams can generate dispersion characteristics using FemSIM in conjunction with MOST.
FemSIM can pinpoint higher order modes as well as cavity modes for arbitrary 2D structures such as defects in planar photonic crystal layers and 3D structures with cylindrical symmetry such as vertical cavity surface-emitting laser (VCSEL) cavities with thin quantum well layers.