2 problems

Let the pump, signal, and idler frequencies be the frequencies involved in the frequency-splitting process described above. Frequency-mixing conjecture. The $\SI{400}{\tera\hertz}$…

Let the pump frequencies be $\omega_{1}$ and $\omega_{2}$, let the idler frequency be $\omega_{i}=\SI{100}{\tera\hertz}$, and let the respective signal frequencies be … The phase-m…