Excitations in HFSS

Hello,

I'm trying to simulate a passage of light via an optical fiber and I'm not sure which excitation to assign.

I've tried a waveport but it says that the fiber cant be made of glass because it is dialectric.

I though that maybe Incident wave would work, but it doesnt even ask fo a surfuce to excite, so I guess it means that it will shower the waves on the whole thing.

Please tell me what kind of excitation I'm looking for.

Thanks

hello Y,
the best way to simulate an excitation in HFSS is following this simple rule:
if the excitation is external to the device(or in some of the edges), you have to use waveport, you have to define a 2d area with suiable dimensions and assign the waveport definition.
If the excitation is internal to the device, you have to define a small 2D area and assign the Lumped Port definition.
You can try something useful tutorial on 2003 HFSS Users Works...
Bye
S.G. 8)