Fig. 1. The theoretical refractive index of In_1-xGa_xAs_yP_1-y as a function of wavelength and doping coefficient y

Fig. 2. Geometry schematic of InP/ In_0.63Ga_0.37As_0.8P_0.2 strip-loaded waveguide

Fig. 3. When w=1.7 μm，h=0.3 μm，h₂=0.9 μm，h₁=1μm，the TE mode intensity distribution of InP/In_0.63Ga_0.37As_0.8P_0.2 strip-loaded waveguide at the wavelength 1.5~1.7 μm

Fig. 4. When w=1.7 μm， h₂=0.9 μm，h₁=1 μm，the mode refractive index n_effdiagram of the strip-loaded waveguide with guide layers InP/In_0.63Ga_0.37As_0.8P_0.2 thickness h from 200 nm to 500 nm

Fig. 5. When w=1.7 μm， h₂=0.9 μm，h₁=1 μm，the second-order dispersion coefficient β₂ and fourth-order dispersion coefficient β₄ the strip-loaded waveguide InP/In_0.63Ga_0.37As_0.8P_0.2 with guide layers thickness h from 200 nm to 500 nm

Fig. 6. When w=1.7 μm，h=0.3 μm，h₂=0.9 μm，h₁=1 μm，the effective mode field area A_effand nonlinear coefficient γ of strip-loaded waveguides InP/In_0.63Ga_0.37As_0.8P_0.2vary with wavelength

Fig. 7. The input signal wavelength corresponding to the pump wavelength is converted into the relation curve corresponding to the idler frequency wavelength

Fig. 8. The phase mismatch curve and conversion efficiency diagram of In_1-xGa_xAs_yP_1-y with doping coefficients y from 0.2 to 0.8 in a strip-loaded waveguide layer at 1 550 nm and 100 mW pumping power

Fig. 9. Strip-loaded waveguide InP/In_0.91Ga_0.09As_0.2P_0.8 conversion efficiency plot of pump power from 80 mW to 140 mW and conversion efficiency plot of pump wavelength from 1 550 nm to 1 560 nm

Fig. 10. When the pump power is 120 mW and the pump wavelength is 1 550 nm，the conversion efficiency of the strip-loaded waveguide InP/In_0.91Ga_0.09As_0.2P_0.8 is from 5 mm to 20 mm