Hi, I am not sure which file you are referring. I opened the lms file, enable FDE, run calculate, I got the result as below:n![](https://us.v-cdn.net/6032193/uploads/LQIP83N7H854/image.png" width=)
nnFor fsp file, since it is for FDTD, you cannot directly add a FDE solver. Instead, you can open one port, then visualize or calculate modes like this:n![](https://us.v-cdn.net/6032193/uploads/ZFWCDP9Q2ANQ/image.png" width=)
However, Port mode is designed for FDTD simulation, not for mode analysis, so you cannot do frequency sweep. nPlease note that FDE uses finer mesh so the mode profile looks smoother.nnI hope this helps.n
nnFor fsp file, since it is for FDTD, you cannot directly add a FDE solver. Instead, you can open one port, then visualize or calculate modes like this:nHowever, Port mode is designed for FDTD simulation, not for mode analysis, so you cannot do frequency sweep. nPlease note that FDE uses finer mesh so the mode profile looks smoother.nnI hope this helps.n
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