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Hi Scott!

I have been tinkering on the simulation starting from the “Lesson6_3dB_coupler” one more time, I took the file from your tutorials and using the same materials (Dielectrics and Channels) as the tutorial again I couldn’t observe any coupling were I must have seen some.
I the attached file I removed the cladding at the coupling region but I couldn’t observe any change.
What can I do to resolve this problem ?