Reply To: Directional Coupler: how to calculate the coupling coefficients?

[Monica Lam]

Thank you for your answer. I have an additional question.

What is the (physical) meaning of k0 and kL as is written on this webpage?:

https://optics.ansys.com/hc/en-us/articles/360034179494-directional-coupler-parameterized-CML-Compiler-Model