Learning Forum

[Prateeksha]

Hi,
I want to export VarFDTD results to Interconnect for that I used mode expansion monitor as shown in the example https://optics.ansys.com/hc/en-us/articles/360034902433-Using-and-understanding-Mode-Expansion-Monitors
But I am getting weird results of s-parameters (S11 and S21). I just edited the "analysis program" given in the ring resonator example but it doesn't work. I used following code:

•in = getresult("mode_expansion","expansion for in");

•drop1 = getresult("mode_expansion","expansion for output1");

•S11 = S22 = S33 = in.b/in.a;

•S21 = S12 = drop1.a/in.a;

•S = matrixdataset;

•S.addparameter("f",in.f,"lambda",in.lambda);

•S.addattribute("S11",S11);

•S.addattribute("S21",S21);

•# export to file for INTERCONNECT

•Sdata = [S.f, abs(S11), unwrap(angle(S11)), abs(S21), unwrap(angle(S21))];

 

•if(fileexists(filename)) { rm(filename); }

•format long;

•write(filename,num2str(Sdata));

 

I am attaching the stucture, monitor results, mode expansion monitor settings, s-parameters and link to Lumerical file in the attachment. Please look into the files and suggest me the required changes.

 

attachment.

https://drive.google.com/file/d/1_I8dGlpuyr8Kn56II0ZX4Et77FEWZEJd/view?usp=drive_link

Looking forward to your reply!!

Thanks in advance!!

Prateeksha

[Guilin Sun]

How weird is the result? too small/large or bumpy? If the graph showing above is what you mean, it looks good.

 we are not allowed to download the simulation files on the forum per Ansys policy.