I have a question on the same example please.
Taking the coupling coefficient as abs(S)^2 makes it the same value as T taken from power monitor at the same place. right? In this case coupling coefficient (expressed most of the time as kappa) is dimensionless. In reality it should be expressed in units of m^-1.
How this can be interpreted and how we can get kappa in units of m^-1 to compare to other published papers.
Thank you.