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Grating coupler design

- October 24, 2024 at 12:00 pm
  
  rahul.sanghvi
  Subscriber
  
  I am designing a grating coupler and the transmission value is negative. I dont understand why is it negative or should I check the absolute value?
- October 24, 2024 at 5:52 pm
  
  Kirill
  Forum Moderator
  
  Hello Rahul,
  
  Negative values mean the power is flowing in the negative direction of the axis. You can find some additional information on this topic in transmission - Script command, and Tips for accurately measuring reflection in an FDTD simulation.
  
  Best regards,
  Kirill
  - October 25, 2024 at 2:37 pm
    
    rahul.sanghvi
    Subscriber
    
    Thank you so much for the clarification.

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