How to get device phase in FDTD solution?

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Marvin
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These days, I designed a Bragg grating using FDTD Solution. But when I try to get its phase information of the transmission spectrum, I meet some trouble. Could anyone give me some suggestion? Which monitor should I choose? Or should I use INTERCONNECTION? Thank you !
 
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You are asking how to access phase information from a simulated optical system you implemented in the FDTD Solution's 3D solver software. I have never seen anyone here speak of that program. Is there another forum here that is more appropriate?
 
Thank you for your reply. But I didn't find any section about Photonics or Optics in Physics Forums. Do you have any good suggestions?