In this learning track we will start with the discussion of the algorithm used to find the eigenmodes of a given structure and the properties of those modes in Ansys Lumerical FDE. We will then learn about the material database and how to add new materials followed by a detailed discussion of the properties that are set in the Ansys Lumerical FDE solver. Next, we will learn about the workflow for setting up an FDE simulation to find the supported modes of a waveguide and analyze the frequency response of the modes. We will also learn what types of devices and applications can be simulated using the FDE solver, and the types of results that can be obtained using the analysis tools. Finally we will discuss how to run the Ansys Lumerical FDE solver, use the built-in analysis options, get results using the scripting language, and export results. We will also discuss convergence testing for verifying result accuracy.