Grating coupling strength(α) calculation for a Uniform Grating coupler

- April 12, 2022 at 6:59 pm
  
  rajatkumar.sinha
  Subscriber
  
  I am trying to find the grating coupling strength(α) for the Uniform grating coupler. In any grating coupler
  formulaa.png
- April 13, 2022 at 10:36 pm
  
  Guilin Sun
  Ansys Employee
  
  When you place monitors across gratings, due to lattice resonance (I called it), or bloch mode nature, the power does not monotonically decrease, in nature. However you can still see the trend as your last image shows. You could do some kind of average, say in a period and see if the result improves.
- April 13, 2022 at 11:27 pm
  
  rajatkumar.sinha
  Subscriber
  
  Thank you for the suggestion. I took the maxima of all the oscillations(rather than average) and then tried curve fitting and that worked. Thank you so much!!
- April 14, 2022 at 5:20 pm
  
  Guilin Sun
  Ansys Employee
  
  You are welcome! wish you a great success for your research.

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