Learning Forum

[WENKAI YANG]

Recently I use Mode to calculate the propertires of corresponding wavegeuide and export the data to INTERCONNECT.

After tracking the mode and frequency sweeping, waveguide properties such as effective index and group index are obtained as shon below.

 

Then I export it as a INTERCONNECT file which mode waveguide could use. However, during the simulation in INTERCONNECT, the result is strange, so I export this data as Matlab. file format and check it. It is weird that in the data file, there is no group index. Also, there are two matrixes which have two same data(f_vg and f_D)  as shown below

f_vg:

 

f_D:

 

As you can see, these two results are completely same and there is no group index in this file, so I wonder why it would happen.

Thank you and wish your reply!

[Kyle]

Hello,

The f_vg and f_D vectors are the corresponding frequencies for the vg (group velocity) and D (dispersion) results, which are the same. The group index can be found by dividing the speef of light c by the group velocity result vg.

[WENKAI YANG]

Yes in this case I understand. But I wonder if I export the data of waveguide properties to INTERCONNECT in a mode waveguide, how about the group index? Does the INTERCONNECT will calculate corresponding group index by itself?

This point is very important for me beacuse I am now doing a ring modulator simuation. I need to calculate the EO response and eye diagram, for getting these two results, group index of mode waveguide is very important.

You could see this post:

Different result of ONA in INTERCONNECT for impulse response and scattering data (ansys.com)

It seems that I cannot set the group index directly in mode waveguide element, so how should I do in this case?

Thank you and wish your reply!