Launch Fields define where light will enter a photonic device in Rsoft CAD. An example that uses multiple launch fields is the beam combiner.
On the sidebar, select “Edit Launch Fields”. To add a new lauch, select New and chose the pathway. A waveguide will be selected by default. Moving the launch to a new location however will place it elsewhere. Input a parameter other than “default” to change the location, and other beam parameters.
Choosing “View Launch” will plot the field amplitude of the launches. For the plot below, the third launch was removed.
Right-clicking on the structure will give the option to chose the “Combine Mode.” Be sure that Merge is selected to allow waveguides to combine.