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Meshing in Comsol

  1. May 7, 2014 #1
    Hello everyone!
    I am simulating a distributed Bragg grating filter using comsol. The mesh i used is like wavelength/index/8, but i do not get symmetric spectrum to Bragg wavelength.Layers are λ/4 width. Is there a special meshing for these Bragg layers? Or is there someone who can give me suggestion?
    Thank you.
     
  2. jcsd
  3. Jun 26, 2014 #2
    You probably need to mesh smaller.

    One trick: if you have a particular section of a system that has a large difference in critical physical dimensions within a larger piece of material, you can define a faux structure around that critical section (of the same material) and tell Comsol to mesh that volume smaller but then use a larger mesh for the larger dimensioned pieces. This can have a radical improvement on both accuracy and simulation time.
     
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