Learning Forum

[buchinskii.av]

Hello! Im wanna to calculate function N_g (R), where is N_g - group index and R - bend radius of bent waveguide. For N_g (wavelength) i need to do frequency sweep with FIXED bend radius. In the end i want to do parametres sweep with parametr - bend radius. But every time i do this its occured error - No data set was found for the result model::FDE::data:N_g. Please, help me!

[Kyle]

The group index can be automatically calculated in a single FDE simulation for a straight waveguide but not for a bent waveguide, which is why there is no result. You can calculate the group index as a function of bend radius by running a nested parameter sweep that sweeps both bend radius and frequency then post-processing the results to calculate the group index at each bend radius, similar to what is done in this example: https://support.lumerical.com/hc/en-us/articles/1500006208582. Alternatively you can use a for loop in a script file to sweep the bend radius and use the frequencysweep command to calculate the group index at each value of the bend radius in the for loop.

[buchinskii.av]

Thank you!