Reply To: FDE : Simulation waveguides with electrodes

[Amrita Pati]

Hi Sara,

You are welcome! By modifying the geometry of the mesh, do you mean you are changing the overall simulation span? Or is there a mesh override region involved? When you change the span, does the amount of electrode inside the simulation region change? Or the electrodes are always fully inside the simulation region? Typically, the bigger the simulation region is the more accurate the results are. This is because the larger the simulation span, the less is the modal interaction with PML (PML interactions can create artificial gain/loss). So, I would recommend increasing the simulation region in steps until the results (like losses) have converged. You can have a coarse mesh in the background, a finer mesh over the waveguide (for accurate field calculation), and then run the simulation for few different (increasing) simulation spans until you see the losses converge to a reasonable value.

 

Regards,
Amrita