Learning Forum

[m.hoormann]

Hello,

thank you for the answer.
The port in the ring itself is positioned at the bottom and the port on the waveguide is placed at its end (see the picture). 

I found that increasing the simulation time further to 200000 fs and using 64 PML layers got rid of the issue. However, I would think there could be still an issue, as the simulation time seems unnecessary high.