Fig. 2: Adapted poling simulation analysis of DFG.
From: Integrated broadband and high-efficiency difference frequency generation
a–c Simulated modal profiles of (a) pump, (b) signal, and (c) idler waves in the designed thin-film PPLN waveguide. d–f Simulated DFG conversion characteristics of pump, signal, and idler waves under conditions of ideal phase matching (d), without the adapted-poling method (e), and with the adapted-poling method (f) when inhomogeneity of the TFLN layer is considered. g Simulated normalized CE at different signal wavelengths in conditions of ideal phase matching and with the adapted-poling method. h Simulated normalized CE at different signal wavelengths under different thickness measuring step sizes.
