The built-in “Optical Splitter/Coupler” element doesn’t seem to support frequency dependency.
Hi @xwang, you are right about the build in “Optical Splitter/Coupler” element that it doesn’t support frequency dependency. If you want a frequency dependent coupler, I suggest to use the “Waveguide coupler” element instead. By changing the “input parameter” to table, you will be able to define the frequency dependent coupling coefficients in the table. Also, if you are familiar with s-parameters, you can consider using the “Optical N Port S-Parameter” element to load the coupling/splitting coefficients versus frequency s-parameter data. Please refer to the following KB page for more information on the s-parameter file format: Optical N Port S-parameter (SPAR).