Same codes, different result? Edge coupler design with MODE FDE
I'm simulating an edge coupler similar as Edge coupler – Lumerical Support
I download the package and find the codes of building the structures in the file Edge_Coupler_No_Substrate.lms
I copied down the scripts and added the same SMF-28 fibre by codes. But I cannot get the same mode profile as the example project. I'm very sure I'm using the same parameters like the example. The first one is my result, and the second is the mode profile from the example file.
My codes are attached. I was thinking the problem is from the mesh setting. But now it looks like meshes are correct.
Very appreciate it if you could give some idea about finding where the problem comes from. I did not do much modification but just add fibre and FDEsimulation area.