I tested a chi3/chi2 model for calculating nonlinear property.
I compared results between a linear case and a nonlinear case.
However, the result of the linear and the nonlinear case is different even if nonlinear coefficient is set to zero when chi3/chi2 model is used (I checked the reference material when considering chi3/chi2 model).
In linear case, for example, the resonant wavelength is 1550 nm, but the resonant wavelength in nonlinear case is 1580 nm when the third order nonlinear coefficient is 0. It should be same because the nonlinearity doesn’t exist.
I also used Kerr model. In this case the resonant wavelength is same as the linear case. So, I think I had a mistake using chi3/chi2 model.
I attach my source code file. Please review it.
Kerr_Chi3.fsp (2.5 MB)