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The eigenvalue transform is not supported
Posted 10 ott 2019, 01:24 GMT-4 Wave Optics, Studies & Solvers, Structural Mechanics Version 5.4 1 Reply
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Hi, everyone
Sorry to bother you a few moment.
Hi, everyone
Sorry to bother you a few moment.
# I got a problem that's "The eigenvalue transform for Mode analysis is not supported by all physics it solves for - Physics: Solid Mechanics (solid)"
I want to build a model to simulate a relationship between optical mode and thermal expansion of geometry; In other words, I want to know if a special fiber like photonic crystal fiber thermal expanded when changing temperature whether transmission mode would be influence.
In step2: Mode Analysis under Study, I choose both solid mechanics and EM wave, then I compute the model. Here comes the problem about "The eigenvalue transform for Mode analysis is not supported by all physics it solves for - Physics: Solid Mechanics (solid)"
Do anyone know how to fix this question? or could give me a similar example?
Many Thanks...
Yi-Lin Yu
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Hi Yi-Lin,
It is only the EM interface that supports the Effective mode index Transform in the Mode Analysis Study Settings. However, both Solid Mechanics and the EM interfaces support the Out-of-plane wave number Transform. Thus, use Out-of-plane wave number, if you want to include both physics interfaces in the Mode Analysis study step.
If you initially considered solving for effective mode indices around the value 
, when you use the Out-of-plane wave number Transform, set Search for modes around to 
. This will solve for modes propagating in the out-of-plane direction with propagation constants around 
, where 
is the vacuum wavelength.