July 31, 2023 at 6:30 pm
Devika Padmakumar Nair
Ansys Employee

Hello, You like to calculate tranmission after a particular length right?

While analyzing the result using DFT monitor, keep this in mind. 

E: Electric field data as a function of position and frequency/wavelength.
H: Magnetic field data as a function of position and frequency/wavelength.
P: Poynting vector as a function of position and frequency/wavelength.
T: Transmission as a function of frequency/wavelength.

You can get more information here :Frequency-domain Profile and Power monitor - Simulation object – Ansys Optics

I would suggest to use "2D X-normal" monitor type. 

Thanks