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Ansys Learning Forum Forums Discuss Simulation Photonics The meaning of abs^2 in S-parameter Reply To: The meaning of abs^2 in S-parameter

Guilin Sun
Ansys Employee

As mentioned previously, abs^2 is power or intensity quantity, and since it is already normalized, you can label it as transmission/reflection of the specific mode. When we say S parameters, they are always associated with modes. In broad definition, plane wave, Gaussian beam and waveguide modes are all "modes". 

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