OptoDesigner Propagation Simulation Modules

2D FDTD Simulations Module

2D Finite Difference Time Domain (FDTD) solves the full set of time-dependent Maxwell’s equations by discretizing time using Courant–Friedrichs–Lewy condition to prevent divergence in the solution. The algorithm provides a robust solution for all-axis field propagation analysis.


The 2D FDTD Simulations Module is useful for designing high-contrast technology components. While other algorithms simulate reflection and transmission along only one axis, FDTD simulates them in all directions. 

FDTD provides complete omnidirectional 2D simulation capabilities with advanced features such as pulse simulation.


2D FDTD is most suitable for smaller structures that can be analyzed in high detail, such as grating couplers, diffraction gratings, and photonic crystals. Complete spectra can be obtained and evaluated.


  • Simulate both continuous wave and pulse signals to calculate the complete spectral response
  • Visualize and plot propagating field components