Discussion Forum

Hi,

I'm studying the design for the optical waveguides. I wanted to obtain the results of 3D modal analysis of the optical fiber by using COMSOL (Model wizard - 3D - RF Module - EMW). And I selected the frequency domain in the study step. In the Geometry, the optical fiber was drawn, I set up the index of refraction of the core and clad in the Materials.
I made 2 Ports, and set those to the both side of the core of the optical fiber. And after that I formed the Mesh with Free Tetrahedral 1, fixed the frequency range from 3e14 to 4e14(the space is 0.1e14), and compute the Study.
(Referred to the h_bend_waveguide_3d of the model library, I made Parametric Sweep.)

Here, my question is as follows.

1. Why doesn't figure which the electric field shows normally come out properly?
2. The port seems to have to be set up in the optical fiber as the Coaxial,Why is the error generated if it does with the Coaxial? (tarnally, If it does with the Rectangular in the Type of Port, there is no error. Of course,but figure of the electric field came out wrong.)
3. Is the mistake that I selected to choose the frequency domain in the study step? In that case, Do I have to select the Boundary Mode Analysis or other thing?

The COMSOL seems to be so difficult in understanding. Please,a advice is asked I for.
(I attached the mph file which I made in the version 4.0a of the COMSOL)