Learning Forum

[tim.fuhrmann]

Hello, 

I am simulating a waveguide with a ring next to it with FDTD. I added two ports, one for the output and one for the input. The modal properties are the follwoing for the input port.

If I click on Visualize Mode Data I get the follwoing errors:

As shown in the follwoing picture the waveguide is within the port.

The overall layout is the following:

I am happy about any hint. Thank you in advance,
Tim

[Greg Baethge]

Hi Tim,

Thanks for posting your question. Could you check the mesh over the waveguide? The PML boundaries look quite thick, that typically happens either when using a large number of layers or when using a coarse mesh. So I would check the mesh size over the waveguide with respect to the waveguide dimensions and the wavelength range.

 

[tim.fuhrmann]

Hi Greg, 

thank you for your quick reply. Changing the mesh settings and changing the tickness of the PML boundaries worked perfectly, thank you.

Best,
Tim 

[Greg Baethge]

You're most welcome, Tim, glad I could help!