Sir,
1. Center frequency = 193.414 THz, FWHM = 147.09 THz. DFT spectrum was set to auto which was from some 1420nm-1700nm wavelength for 200 sample values.
2. I am using simple Si and SiO2 with constant real refractive index. n_Si = 3.473, n_SiO2 = 1.444. There is no imaginary part.
I can’t figure out where did I make the mistake.