August 18, 2023 at 5:50 pm
Amrita Pati
Ansys Employee

Hello,

Are you referring to the mode source used in a Bragg grating? By default the mode source only selects the fundamental mode.You can choose "user select", and then "select mode". This would open up the eigenmode solver and you should be able to calculate the modal properties of multiple modes.

Regards,
Amrita