Learning Forum

[Aneek James]

Hello all,

Is there a way to change interconnects settings such that more than 2 orthognal modes are supported at any given time? It seems like it default assumes you'd only be interested in a TE and TM like mode, but what if you wanted to simulate more than just these two? When I load an s parameter file (generated from an FDTD  sim) with 3 modes defined, the ONA element only shows the results for the first two modes, but not the last one.

Thanks!

[Devika]

Hello,

ONA will show results for the mode corresponding to the orthogonal identifier. If you like to visualize mode 3, change the value to 3 and run the simulation. 

You can find more information on ONA here : Optical Network Analyzer (ONA) - INTERCONNECT Element – Ansys Optics

Thank you.

[Aneek James]

So this works for modes 1 and 2 but not 3. When I do this for mode 3, it says that no results are saved:

Similarly, when I launch from the other input port I only see the results for two modes:

So it seems to be ignoring the third mode defined in the .dat file.

[Devika]

 

This seems like no mode 3 data in S-parameter file. I tried with my simulation and I am getting result. Can you doble check S-parameter file? 

 

[Aneek James]

The .dat file was generated from an S-parameter sweep, so it should be formatted correctly. I'm checking and there's data for each port and mode as expected. The data in the file also matches the data I saw in the vizualizer in FDTD.

I can't upload the file for CUI reasons, but can you upload the .dat file that you're using? So I can compare what's different?

[Devika]

We cannot download any file. But I can definitely try simulating a similar device and test. Which component are you using to generate S-parameters? Please let me know.

[Aneek James]

I don't think I can mention what device it is, but showing me how this would work for a multi-mode waveguide that supports 3 modes would help.

[Devika]

I generated S-parameter of MMI splitter. Then I run a simulation using that S-parameter in interconnect. I am getting results without any problem. 

Make sure generated S-parameter does have mode 3 data.