Users build structures using built-in primitives. Each object is defined by its start and end coordinates, which can be specified in either absolute terms or relative to other objects.
After a simulation is executed, the CAD environment links directly to WinPlot and DataBROWSER. These utility tools allow for the immediate visualization of 2D/3D field distributions, spectral responses, and mode profiles. Furthermore, the RSoft CAD is designed to integrate with electronic design automation (EDA) tools, facilitating a seamless workflow from individual photonic device design to full-scale photonic integrated circuit (PIC) simulation.
By mastering the RSoft CAD environment, designers can efficiently prototype complex optical structures, ranging from simple waveguides and gratings to advanced photonic crystals and metasurfaces. rsoft cad manual
A key feature of the RSoft CAD is its use of symbolic variables. Rather than entering static numerical values for lengths or widths, users can define variables (e.g., "width = 0.5"). This allows for easy parametric sweeps and optimization, as changing a single variable updates all dependent objects in the design. Object Construction and Properties
The CAD interface uses a hierarchical approach to design. At the top level is the Global Settings dialog, where fundamental simulation parameters—such as the free-space wavelength, background refractive index, and dimension scales—are established. The workspace itself is a 3D coordinate system (X, Y, Z) where users place various geometric "objects." Users build structures using built-in primitives
Once the geometry is finalized, the CAD interface is used to set up the simulation "engines."
Launch Conditions: Users define the input light source, such as a Gaussian beam, a fiber mode, or a plane wave. The launch position and direction are visually represented in the CAD layout.Monitors: These are virtual sensors placed within the design to record data. Power monitors measure transmission and reflection, while slice monitors capture the spatial distribution of the electromagnetic field at specific cross-sections.Grid and Mesh: The CAD provides tools to define the computational grid. Users can choose between uniform meshing or non-uniform (sub-gridding) to resolve fine structural details while maintaining efficiency. Data Analysis and Integration These utility tools allow for the immediate visualization
The CAD tool also supports a "Layer" system. This is particularly useful for integrated photonics (PIC) design, allowing users to group objects into specific fabrication levels, such as the silicon core layer, cladding layer, or metal contact layer. Material and Index Modeling